public async Task JoinMulticastGroupAsync(
string multicastAddress,
int port,
ICommunicationInterface communicationInterface = null,
bool allowMultipleBindToSamePort = false)
{
CheckCommunicationInterface(communicationInterface);
var ipAddress = (communicationInterface as CommunicationInterface)?.NativeIpAddress ?? IPAddress.Any;
var ipEndPoint = new IPEndPoint(ipAddress, port);
InitializeUdpClient(ipEndPoint, allowMultipleBindToSamePort);
MessageConcellationTokenSource = new CancellationTokenSource();
var multicastIp = IPAddress.Parse(multicastAddress);
try
{
BackingUdpClient.JoinMulticastGroup(multicastIp, TTL);
}
catch (Exception ex)
{
throw (NativeSocketExceptions.Contains(ex.GetType()))
? new PclSocketException(ex)
: ex;
}
_multicastAddress = multicastAddress;
_multicastPort = port;
await Task.Run(() => RunMessageReceiver(MessageConcellationTokenSource.Token)).ConfigureAwait(false);
}
protected void MulticastAddMembership(IPAddress ipAddress, IPAddress mcastAddress)
{
if (!IsMulticastActive)
{
throw new ArgumentException("Multicast interface must be initialized before adding multicast memberships");
}
if (MulticastMemberships.ContainsKey(mcastAddress.ToString()))
{
if (MulticastMemberships[mcastAddress.ToString()].Equals(true))
{
// The membership has already been added - do nothing
return;
}
}
BackingUdpClient.JoinMulticastGroup(mcastAddress, ipAddress);
MulticastMemberships.Add(mcastAddress.ToString(), true);
}
