/// <summary>Starts an asynchronous write operation of the buffer data to the socket
/// starting at the given offset, completed is set to true if the write operation
/// account for the remaining of the buffer data or false otherwise, returns whenever
/// the asynchronous operation completed synchronously or not.</summary>
/// <param name="buffer">The data to write to the socket as a list of byte array segments.</param>
/// <param name="offset">The zero based byte offset into the buffer at what start writing.</param>
/// <param name="callback">The asynchronous completion callback.</param>
/// <param name="state">A state object that is associated with the asynchronous operation.</param>
/// <param name="completed">True if the write operation accounts for the buffer remaining data, from
/// offset to the end of the buffer.</param>
/// <returns>True if the asynchronous operation completed synchronously otherwise false.</returns>
public bool StartWrite(IList <ArraySegment <byte> > buffer, int offset, AsyncCallback callback, object state,
out bool completed)
{
Debug.Assert(_fd != null && _writeEventArgs != null);
if (_state == StateConnectPending)
{
completed = false;
_writeCallback = callback;
try
{
if (_sourceAddr != null)
{
Network.DoBind(_fd, new IPEndPoint(_sourceAddr, 0));
}
EndPoint?addr = _proxy != null?_proxy.GetAddress() : _addr;
Debug.Assert(addr != null);
_writeEventArgs.RemoteEndPoint = addr;
_writeEventArgs.UserToken = state;
return(!_fd.ConnectAsync(_writeEventArgs));
}
catch (Exception ex)
{
throw new TransportException(ex);
}
}
try
{
int count = buffer.GetByteCount();
int remaining = count - offset;
buffer.FillSegments(offset, _sendSegments, Math.Min(remaining, _maxSendPacketSize));
_writeCallback = callback;
_writeEventArgs.UserToken = state;
_writeEventArgs.BufferList = _sendSegments;
bool completedSynchronously = !_fd.SendAsync(_writeEventArgs);
completed = _maxSendPacketSize >= remaining;
return(completedSynchronously);
}
catch (SocketException ex)
{
if (Network.ConnectionLost(ex))
{
throw new ConnectionLostException(ex);
}
throw new Ice.TransportException(ex);
}
catch (ObjectDisposedException ex)
{
throw new ConnectionLostException(ex);
}
}
public virtual Endpoint Listen()
{
try
{
Debug.Assert(_fd != null);
_addr = Network.DoBind(_fd, _addr);
Network.DoListen(_fd, _backlog);
}
catch (SystemException)
{
_fd = null;
throw;
}
_endpoint = _endpoint.GetEndpoint(this);
return(_endpoint);
}
public Endpoint Bind()
{
Debug.Assert(_fd != null);
if (Network.IsMulticast((IPEndPoint)_addr))
{
Network.SetReuseAddress(_fd, true);
_mcastAddr = (IPEndPoint)_addr;
if (AssemblyUtil.IsWindows)
{
//
// Windows does not allow binding to the mcast address itself
// so we bind to INADDR_ANY (0.0.0.0) instead. As a result,
// bi-directional connection won't work because the source
// address won't the multicast address and the client will
// therefore reject the datagram.
//
if (_addr.AddressFamily == AddressFamily.InterNetwork)
{
_addr = new IPEndPoint(IPAddress.Any, _port);
}
else
{
_addr = new IPEndPoint(IPAddress.IPv6Any, _port);
}
}
_addr = Network.DoBind(_fd, _addr);
if (_port == 0)
{
_mcastAddr.Port = ((IPEndPoint)_addr).Port;
}
Debug.Assert(_mcastInterface != null);
Network.SetMcastGroup(_fd, _mcastAddr.Address, _mcastInterface);
}
else
{
_addr = Network.DoBind(_fd, _addr);
}
_bound = true;
Debug.Assert(_endpoint != null);
_endpoint = _endpoint.Endpoint(this);
return(_endpoint);
}
