public async Task StartAsync(CancellationToken ct)
{
using (var udpClient = new UdpClient(AddressFamily.InterNetworkV6))
{
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket,
SocketOptionName.ReuseAddress, true);
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket,
SocketOptionName.ExclusiveAddressUse, false);
udpClient.Client.Bind(new IPEndPoint(IPAddress.IPv6Any, _localPort));
foreach (var nicIndex in CollectNetworkInterfaceIndexes())
{
udpClient.JoinMulticastGroup(nicIndex, _mcastGroup);
}
while (true)
{
ct.ThrowIfCancellationRequested();
var result = await udpClient.ReceiveAsync()
.WithCancellation(ct)
.ConfigureAwait(false);
if (_qualifiers.All(q => q.IsSourceQualified(result.RemoteEndPoint)))
{
var e = new MulticastMsgEventArgs(
new IPEndPoint(_mcastGroup, _localPort),
result.RemoteEndPoint,
result.Buffer);
OnMessageReceived(e);
}
}
}
}
private void MessageReceived(object sender, MulticastMsgEventArgs mMsg)
{
Log.Info($"Receved message from {mMsg.RemoteEndpoint.Address}:{mMsg.RemoteEndpoint.Port}. Message length is {mMsg.Data.Length}");
var message = new MulticastMessage(mMsg.Data, mMsg.MCastEndpoint);
_mcastQueue.Post(message);
}
protected void OnMessageReceived(MulticastMsgEventArgs e)
{
Volatile.Read(ref MessageReceived)?.Invoke(this, e);
}
