/// <summary>
/// Method to execute the broadcast
/// </summary>
/// <param name="client">the udp client</param>
/// <param name="broadcast">The broadcast to send to the client.</param>
private async Task BroadcastAsync(UdpClient client, UpnpBroadcast broadcast)
{
int broadcasts = 0;
do
{
await client.SendAsync(broadcast.Content, broadcast.ContentLenght, broadcast.IpEndPoint);
broadcasts++;
await Task.Delay(TimeSpan.FromSeconds(2));
} while (broadcasts < 5);
}
private async Task BeginSendReceiveAsync(IPAddress broadcastAddress, Action <FritzDevice> callback)
{
using (UdpClient client = new UdpClient(broadcastAddress.AddressFamily))
{
List <Task> receivebroadcast = new List <Task>();
client.MulticastLoopback = false;
Socket socket = client.Client;
var broadcastViaIpV4 = broadcastAddress.AddressFamily == AddressFamily.InterNetwork;
if (broadcastViaIpV4)
{
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastInterface, broadcastAddress.GetAddressBytes());
}
else
{
byte[] interfaceArray = BitConverter.GetBytes((int)broadcastAddress.ScopeId);
var mcastOption = new IPv6MulticastOption(broadcastAddress, broadcastAddress.ScopeId);
socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.MulticastInterface, interfaceArray);
}
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
socket.ReceiveBufferSize = Int32.MaxValue;
client.ExclusiveAddressUse = false;
socket.Bind(new IPEndPoint(broadcastAddress, 1901));
var broadCast = broadcastViaIpV4 ? UpnpBroadcast.CreateIpV4Broadcast() : UpnpBroadcast.CreateIpV6Broadcast();
if (broadcastViaIpV4)
{
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(broadCast.IpAdress));
}
else
{
socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.AddMembership, new IPv6MulticastOption(broadCast.IpAdress, broadcastAddress.ScopeId));
}
await Task.WhenAll(
this.ReceiveAsync(client, callback),
this.BroadcastAsync(client, broadCast)
);
}
}
