public Endpoint Bind(UdpEndpoint endpoint)
{
Debug.Assert(_incoming);
try
{
if (Network.IsMulticast(_addr))
{
Socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ExclusiveAddressUse, false);
Socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
MulticastAddress = _addr;
if (OperatingSystem.IsWindows())
{
// Windows does not allow binding to the multicast address itself so we bind to INADDR_ANY
// instead. As a result, bidirectional connection won't work because the source address won't
// be the multicast address and the client will therefore reject the datagram.
if (_addr.AddressFamily == AddressFamily.InterNetwork)
{
_addr = new IPEndPoint(IPAddress.Any, _addr.Port);
}
else
{
_addr = new IPEndPoint(IPAddress.IPv6Any, _addr.Port);
}
}
Socket.Bind(_addr);
_addr = (IPEndPoint)Socket.LocalEndPoint !;
if (endpoint.Port == 0)
{
MulticastAddress.Port = _addr.Port;
}
Network.SetMulticastGroup(Socket, MulticastAddress.Address, _multicastInterface);
}
else
{
Socket.Bind(_addr);
_addr = (IPEndPoint)Socket.LocalEndPoint !;
}
}
catch (SocketException ex)
{
throw new TransportException(ex);
}
Debug.Assert(endpoint != null);
return(endpoint.Clone((ushort)_addr.Port));
}
//
// Only for use by UdpConnector.
//
internal UdpTransceiver(Communicator communicator, string transport, EndPoint addr, IPAddress?sourceAddr,
string mcastInterface, int mcastTtl)
{
_communicator = communicator;
Transport = transport;
_addr = addr;
if (sourceAddr != null)
{
_sourceAddr = new IPEndPoint(sourceAddr, 0);
}
_readEventArgs = new SocketAsyncEventArgs();
_readEventArgs.RemoteEndPoint = _addr;
_readEventArgs.Completed += new EventHandler <SocketAsyncEventArgs>(IoCompleted);
_writeEventArgs = new SocketAsyncEventArgs();
_writeEventArgs.RemoteEndPoint = _addr;
_writeEventArgs.Completed += new EventHandler <SocketAsyncEventArgs>(IoCompleted);
_mcastInterface = mcastInterface;
_state = StateNeedConnect;
_incoming = false;
try
{
_fd = Network.CreateSocket(true, _addr.AddressFamily);
SetBufSize(-1, -1);
Network.SetBlock(_fd, false);
if (Network.IsMulticast((IPEndPoint)_addr))
{
if (_mcastInterface.Length > 0)
{
Network.SetMcastInterface(_fd, _mcastInterface, _addr.AddressFamily);
}
if (mcastTtl != -1)
{
Network.SetMcastTtl(_fd, mcastTtl, _addr.AddressFamily);
}
}
}
catch (System.Exception)
{
_fd = null;
throw;
}
}
// Only for use by UdpConnector.
internal UdpSocket(
Communicator communicator,
IConnector connector,
EndPoint addr,
IPAddress?sourceAddr,
string?multicastInterface,
int multicastTtl)
{
_communicator = communicator;
_connector = connector;
_addr = (IPEndPoint)addr;
_multicastInterface = multicastInterface;
_incoming = false;
if (sourceAddr != null)
{
_sourceAddr = new IPEndPoint(sourceAddr, 0);
}
Socket = Network.CreateSocket(true, _addr.AddressFamily, _connector);
try
{
Network.SetBufSize(Socket, _communicator, Transport.UDP);
_rcvSize = (int)Socket.GetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveBuffer) !;
_sndSize = (int)Socket.GetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer) !;
if (Network.IsMulticast(_addr))
{
if (_multicastInterface != null)
{
Debug.Assert(_multicastInterface.Length > 0);
Network.SetMulticastInterface(Socket, _multicastInterface, _addr.AddressFamily);
}
if (multicastTtl != -1)
{
Network.SetMulticastTtl(Socket, multicastTtl, _addr.AddressFamily);
}
}
}
catch (SocketException ex)
{
Socket.CloseNoThrow();
throw new TransportException(ex, RetryPolicy.NoRetry, _connector);
}
}
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 = (UdpEndpoint)_endpoint.NewPort(EffectivePort());
return(_endpoint);
}
