| public DropMulticastGroup ( IPAddress multicastAddr ) : void | ||
| multicastAddr | IPAddress | |
| return | void | |
private static async Task ReaderAsync(int port, string groupAddress)
{
using (var client = new UdpClient(port))
{
if (groupAddress != null)
{
client.JoinMulticastGroup(IPAddress.Parse(groupAddress));
WriteLine($"joining the multicast group {IPAddress.Parse(groupAddress)}");
}
bool completed = false;
do
{
WriteLine("starting the receiver");
UdpReceiveResult result = await client.ReceiveAsync();
byte[] datagram = result.Buffer;
string received = Encoding.UTF8.GetString(datagram);
WriteLine($"received {received}");
if (received == "bye")
{
completed = true;
}
} while (!completed);
WriteLine("receiver closing");
if (groupAddress != null)
{
client.DropMulticastGroup(IPAddress.Parse(groupAddress));
}
}
}
private void HandleBroadcasts()
{
var localIP = new IPEndPoint(IPAddress.Any, 50001);
var udpClient = new UdpClient();
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
udpClient.ExclusiveAddressUse = false;
udpClient.Client.Bind(localIP);
var multicastingIP = IPAddress.Parse("228.5.6.7");
udpClient.JoinMulticastGroup(multicastingIP);
running = true;
while (running)
{
var bytes = udpClient.Receive(ref localIP);
var message = Encoding.UTF8.GetString(bytes);
Dispatcher.Invoke(() =>
{
lblResponse.Content = message;
});
}
udpClient.DropMulticastGroup(multicastingIP);
udpClient.Close();
}
/// <summary>
/// 关闭连接
/// </summary>
public void close()
{
if (IsListening)
{
UdpClient.DropMulticastGroup(GroupIP);
IsListening = false;
thUDPListener.Abort();
}
UdpClient.Close();
}
private void BoardbastMessages()
{
var multicastIP = IPAddress.Parse("228.5.6.7");
var udpClient = new UdpClient();
udpClient.JoinMulticastGroup(multicastIP);
var endPoint = new IPEndPoint(multicastIP, 50001);
running = true;
while (running)
{
Thread.Sleep(2000);
//broadbast the current time to all client
var nowText = DateTime.Now.ToShortTimeString();
var bytes = Encoding.UTF8.GetBytes(nowText);
udpClient.Send(bytes, bytes.Length, endPoint);
}
udpClient.DropMulticastGroup(multicastIP);
udpClient.Close();
}
private void BackgroundListener()
{
IPEndPoint bindingEndpoint = new IPEndPoint(IPAddress.Any, _endPoint.Port);
using (UdpClient client = new UdpClient())
{
client.ExclusiveAddressUse = false;
client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
client.Client.Bind(bindingEndpoint);
client.JoinMulticastGroup(_endPoint.Address);
bool keepRunning = true;
while (keepRunning)
{
try
{
IPEndPoint remote = new IPEndPoint(IPAddress.Any, _endPoint.Port);
byte[] buffer = client.Receive(ref remote);
lock (this)
{
DataReceived(this, new MulticastDataReceivedEventArgs(remote, buffer));
}
}
catch (ThreadAbortException)
{
keepRunning = false;
Thread.ResetAbort();
}
}
client.DropMulticastGroup(_endPoint.Address);
}
}
internal void InitializeUDPDetector()
{
if (NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.Enabled)
{
{
// UDP szerver indítása
List <int> listeningPorts = NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.BroadcastListeningPorts;
if (listeningPorts.Count > 0)
{
if (NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.DetectionMode == UDPDetectionModeEnum.Multicast)
{
Action <AddressFamily, string> initMulticastUdpClient = ((a, ip) =>
{
IPEndPoint broadcastEp = null;
System.Net.Sockets.UdpClient udpClient = null;
foreach (int port in listeningPorts)
{
try
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("CONNECTION_MANAGER, trying to initialize broadcast detector on port {0} ({1}).", port, a.ToString()));
}
IPAddress multicastAddress = IPAddress.Parse(ip); // (239.0.0.222)
broadcastEp = new IPEndPoint(a == AddressFamily.InterNetwork ? IPAddress.Any : IPAddress.IPv6Any, port);
udpClient = new System.Net.Sockets.UdpClient(a);
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
udpClient.ExclusiveAddressUse = false;
udpClient.Client.Bind(broadcastEp);
udpClient.EnableBroadcast = true;
udpClient.MulticastLoopback = true;
udpClient.AllowNatTraversal(true);
udpClient.JoinMulticastGroup(multicastAddress);
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("CONNECTION_MANAGER, broadcast detector initialized on port {0} ({1}).", port, a.ToString()));
}
break;
}
catch (Exception ex)
{
if (LOGGER.IsErrorEnabled)
{
LOGGER.Error(string.Format("CONNECTION_MANAGER, failed to initialize broadcast detector on port {0} ({1}). Reason: {2}", port, a.ToString(), ex.Message), ex);
}
}
}
if (udpClient != null)
{
BroadcastServer server = new BroadcastServer(broadcastEp, udpClient);
mBroadcastServers.Add(server);
server.BeginReceive();
}
});
if (!string.IsNullOrEmpty(NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.IPv4MulticastAddress))
{
initMulticastUdpClient(AddressFamily.InterNetwork, NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.IPv4MulticastAddress);
}
if (NetworkManager.Instance.InternalConfiguration.Settings.EnableIPV6 && !string.IsNullOrEmpty(NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.IPv6MulticastAddress))
{
initMulticastUdpClient(AddressFamily.InterNetworkV6, NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.IPv6MulticastAddress);
}
}
if (NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.DetectionMode == UDPDetectionModeEnum.Broadcast)
{
Action <AddressFamily> initUdpClient = (a =>
{
IPEndPoint broadcastEp = null;
System.Net.Sockets.UdpClient udpClient = null;
foreach (int port in listeningPorts)
{
try
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("CONNECTION_MANAGER, trying to initialize broadcast detector on port {0} ({1}).", port, a.ToString()));
}
broadcastEp = new IPEndPoint(a == AddressFamily.InterNetwork ? IPAddress.Any : IPAddress.IPv6Any, port);
udpClient = new System.Net.Sockets.UdpClient(broadcastEp);
udpClient.EnableBroadcast = true;
udpClient.AllowNatTraversal(true);
if (a == AddressFamily.InterNetwork)
{
udpClient.DontFragment = true;
}
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("CONNECTION_MANAGER, broadcast detector initialized on port {0} ({1}).", port, a.ToString()));
}
break;
}
catch (Exception ex)
{
if (LOGGER.IsErrorEnabled)
{
LOGGER.Error(string.Format("CONNECTION_MANAGER, failed to initialize broadcast detector on port {0} ({1}). Reason: {2}", port, a.ToString(), ex.Message), ex);
}
}
}
if (udpClient != null)
{
BroadcastServer server = new BroadcastServer(broadcastEp, udpClient);
mBroadcastServers.Add(server);
server.BeginReceive();
}
});
initUdpClient(AddressFamily.InterNetwork);
if (NetworkManager.Instance.InternalConfiguration.Settings.EnableIPV6)
{
initUdpClient(AddressFamily.InterNetworkV6);
}
}
}
}
{
// UDP üzenetek szétszórása a hálózatba
List <int> targetPorts = NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.BroadcastTargetPorts;
if (targetPorts.Count > 0)
{
AddressEndPoint[] addressEps = null;
AddressEndPoint[] ipEps = null;
if (NetworkManager.Instance.InternalLocalhost.NATGatewayCollection.NATGateways.Count > 0)
{
addressEps = new AddressEndPoint[NetworkManager.Instance.InternalLocalhost.NATGatewayCollection.NATGateways.Count];
for (int i = 0; i < addressEps.Length; i++)
{
addressEps[i] = NetworkManager.Instance.InternalLocalhost.NATGatewayCollection.NATGateways[i].EndPoint;
}
}
if (NetworkManager.Instance.InternalLocalhost.TCPServerCollection.TCPServers.Count > 0)
{
ipEps = new AddressEndPoint[NetworkManager.Instance.InternalLocalhost.TCPServerCollection.TCPServers.Count];
for (int i = 0; i < ipEps.Length; i++)
{
ipEps[i] = NetworkManager.Instance.InternalLocalhost.TCPServerCollection.TCPServers[i].EndPoint;
}
}
if (addressEps != null || ipEps != null)
{
using (MemoryStream ms = new MemoryStream())
{
{
UdpBroadcastMessage message = new UdpBroadcastMessage(NetworkManager.Instance.InternalLocalhost.Id,
NetworkManager.Instance.InternalLocalhost.NetworkContext.Name, addressEps, ipEps);
MessageFormatter <UdpBroadcastMessage> formatter = new MessageFormatter <UdpBroadcastMessage>();
formatter.Write(ms, message);
ms.Position = 0;
}
// multicast
if (NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.DetectionMode == UDPDetectionModeEnum.Multicast)
{
// multicast
foreach (int port in targetPorts)
{
Action <AddressFamily, string> sendMulticastUdpClient = ((a, ip) =>
{
using (System.Net.Sockets.UdpClient udpClient = new System.Net.Sockets.UdpClient(a))
{
udpClient.MulticastLoopback = true;
udpClient.EnableBroadcast = true;
udpClient.AllowNatTraversal(true);
try
{
IPAddress multicastaddress = IPAddress.Parse(ip);
udpClient.JoinMulticastGroup(multicastaddress);
IPEndPoint remoteEp = new IPEndPoint(multicastaddress, port);
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("CONNECTION_MANAGER, sending multicast message on port {0}. ({1})", port, a.ToString()));
}
udpClient.Send(ms.ToArray(), Convert.ToInt32(ms.Length), remoteEp);
udpClient.DropMulticastGroup(multicastaddress);
}
catch (Exception ex)
{
if (LOGGER.IsErrorEnabled)
{
LOGGER.Error(string.Format("CONNECTION_MANAGER, failed to send multicast message ({0}). Reason: {1}", a.ToString(), ex.Message));
}
}
}
});
if (!string.IsNullOrEmpty(NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.IPv4MulticastAddress))
{
sendMulticastUdpClient(AddressFamily.InterNetwork, NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.IPv4MulticastAddress);
}
if (NetworkManager.Instance.InternalConfiguration.Settings.EnableIPV6 && !string.IsNullOrEmpty(NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.IPv6MulticastAddress))
{
sendMulticastUdpClient(AddressFamily.InterNetworkV6, NetworkManager.Instance.InternalConfiguration.NetworkPeering.UDPDetection.IPv6MulticastAddress);
}
}
}
else
{
// broadcast
using (System.Net.Sockets.UdpClient udpClient = new System.Net.Sockets.UdpClient())
{
udpClient.MulticastLoopback = false;
udpClient.EnableBroadcast = true;
udpClient.AllowNatTraversal(true);
udpClient.DontFragment = true;
foreach (int port in targetPorts)
{
try
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("CONNECTION_MANAGER, sending broadcast message on port {0}.", port));
}
udpClient.Send(ms.ToArray(), Convert.ToInt32(ms.Length), new IPEndPoint(IPAddress.Broadcast, port));
}
catch (Exception ex)
{
if (LOGGER.IsErrorEnabled)
{
LOGGER.Error(string.Format("CONNECTION_MANAGER, failed to send broadcast message. Reason: {0}", ex.Message));
}
}
}
}
}
}
}
else
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info("CONNECTION_MANAGER, both of list NAT gateways and TCP servers are empties for broadcast detection.");
}
}
}
else
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info("CONNECTION_MANAGER, no target udp port definied for broadcast detection.");
}
}
}
}
else
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info("CONNECTION_MANAGER, broadcast detection disabled.");
}
}
}
private static async Task Sender(IPEndPoint endpoint, bool broadcast, string groupAddress)
{
try
{
string localhost = Dns.GetHostName();
using (var client = new UdpClient())
{
client.EnableBroadcast = broadcast;
if (groupAddress != null)
{
client.JoinMulticastGroup(IPAddress.Parse(groupAddress));
}
bool completed = false;
do
{
WriteLine("Enter a message or bye to exit");
string input = ReadLine();
WriteLine();
completed = input == "bye";
byte[] datagram = Encoding.UTF8.GetBytes($"{input} from {localhost}");
int sent = await client.SendAsync(datagram, datagram.Length, endpoint);
} while (!completed);
if (groupAddress != null)
{
client.DropMulticastGroup(IPAddress.Parse(groupAddress));
}
}
}
catch (SocketException ex)
{
WriteLine(ex.Message);
}
}
private void threadProc()
{
IPAddress addr = IPAddress.Parse(address);
IPEndPoint ep = new IPEndPoint(addr, port);
client = new UdpClient(port);
while (!isTerminated)
{
byte[] data = client.Receive(ref ep);
string s = Encoding.UTF8.GetString(data);
this.SetText(s);
vport.Write(s);
}
client.DropMulticastGroup(addr);
client.Close();
}
