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));
}