private void Callback(IAsyncResult result)
{
try
{
UdpBroadcastMessage message = null;
IPEndPoint ep = mBroadcastEp;
using (MemoryStream ms = new MemoryStream(mUdpClient.EndReceive(result, ref ep)))
{
ms.Position = 0;
message = mMessageFormatter.Read(ms);
ms.SetLength(0);
}
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, a broadcast message arrived from '{0}'.", message.SenderId));
}
if (NetworkManager.Instance.InternalLocalhost.Id.Equals(message.SenderId))
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info("BROADCAST_SERVER, this broadcast message arrived from me.");
}
}
else
{
if (NetworkManager.Instance.NetworkContextRuleManager.CheckSeparation(NetworkManager.Instance.InternalLocalhost.NetworkContext.Name,
message.NetworkContextName))
{
// láthatom ezt a context-et, megpróbálok rácsatlakozni
INetworkPeerRemote peer = NetworkPeerContext.GetNetworkPeerById(message.SenderId);
if (peer == null || (peer != null && peer.Distance != 1))
{
// nincs közvetlen kapcsolatom ilyen peer-el
mThreadPool.QueueUserWorkItem(new System.Threading.WaitCallback(ConnectionTask), message);
}
else
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, this is a known peer with direct network connection. No need to establish a new. PeerId: '{0}'.", peer.Id));
}
}
}
else
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, network context separation is active between '{0}' and '{1}'.", NetworkManager.Instance.InternalLocalhost.NetworkContext.Name, message.NetworkContextName));
}
}
}
}
catch (Exception ex)
{
if (LOGGER.IsErrorEnabled)
{
LOGGER.Error(string.Format("BROADCAST_SERVER, failed to receive a broadcast message. Reason: {0}", ex.Message));
}
}
finally
{
BeginReceive();
}
}
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 void ConnectionTask(object state)
{
UdpBroadcastMessage message = (UdpBroadcastMessage)state;
if (LOGGER.IsDebugEnabled)
{
LOGGER.Debug(string.Format("BROADCAST_SERVER, processing message of sender, id: {0}", message.SenderId));
}
if (message.TCPServers != null && message.TCPServers.Length > 0)
{
foreach (AddressEndPoint ep in message.TCPServers)
{
if (ep.AddressFamily == AddressFamily.InterNetwork || (ep.AddressFamily == AddressFamily.InterNetworkV6 && NetworkManager.Instance.InternalConfiguration.Settings.EnableIPV6))
{
try
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, connecting to [{0}] with address [{1}] and port {2}.", message.SenderId, ep.Host, ep.Port));
}
Synapse.NetworkStream stream = NetworkManager.Instance.InternalNetworkManager.Connect(ep);
stream.SendBufferSize = NetworkManager.Instance.InternalConfiguration.Settings.DefaultLowLevelSocketSendBufferSize;
stream.ReceiveBufferSize = NetworkManager.Instance.InternalConfiguration.Settings.DefaultLowLevelSocketReceiveBufferSize;
stream.NoDelay = NetworkManager.Instance.InternalConfiguration.Settings.DefaultLowLevelNoDelay;
NetworkPeerRemote remotePeer = NetworkManager.Instance.ProcessConnection(stream, NetworkManager.Instance.InternalConfiguration.Settings.DefaultConnectionTimeoutInMS, true, !NetworkManager.Instance.InternalConfiguration.Settings.EnableMultipleConnectionWithNetworkPeers);
if (NetworkManager.Instance.IsShutdown)
{
stream.Close();
break;
}
if (remotePeer != null && remotePeer.Id.Equals(message.SenderId))
{
// létrejött a kapcsolat, tovább nem próbálkozunk
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, successfully connected to '{0}' on TCP server.", message.SenderId));
}
break;
}
}
catch (Exception ex)
{
if (LOGGER.IsErrorEnabled)
{
LOGGER.Error(string.Format("BROADCAST_SERVER, failed to connect to [{0}] with address [{1}] and port {2}. Reason: {3}", message.SenderId, ep.Host, ep.Port, ex.Message));
}
}
}
else
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, connecting to [{0}] with address [{1}] not allowed. IPV6 protocol disabled.", message.SenderId, ep.Host));
}
}
}
}
INetworkPeerRemote peer = NetworkPeerContext.GetNetworkPeerById(message.SenderId);
if (peer == null || (peer != null && peer.Distance != 1))
{
if (message.NATGateways != null && message.NATGateways.Length > 0)
{
foreach (AddressEndPoint ep in message.NATGateways)
{
if (ep.AddressFamily == AddressFamily.InterNetwork || (ep.AddressFamily == AddressFamily.InterNetworkV6 && NetworkManager.Instance.InternalConfiguration.Settings.EnableIPV6))
{
try
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, connecting to [{0}] with NAT address [{1}] and port {2}.", message.SenderId, ep.Host, ep.Port));
}
Synapse.NetworkStream stream = NetworkManager.Instance.InternalNetworkManager.Connect(ep);
stream.SendBufferSize = NetworkManager.Instance.InternalConfiguration.Settings.DefaultLowLevelSocketSendBufferSize;
stream.ReceiveBufferSize = NetworkManager.Instance.InternalConfiguration.Settings.DefaultLowLevelSocketReceiveBufferSize;
stream.NoDelay = NetworkManager.Instance.InternalConfiguration.Settings.DefaultLowLevelNoDelay;
NetworkPeerRemote remotePeer = NetworkManager.Instance.ProcessConnection(stream, NetworkManager.Instance.InternalConfiguration.Settings.DefaultConnectionTimeoutInMS, true, !NetworkManager.Instance.InternalConfiguration.Settings.EnableMultipleConnectionWithNetworkPeers);
if (NetworkManager.Instance.IsShutdown)
{
stream.Close();
break;
}
if (remotePeer != null && remotePeer.Id.Equals(message.SenderId))
{
// létrejött a kapcsolat, tovább nem próbálkozunk
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, successfully connected to '{0}' on NAT address.", message.SenderId));
}
break;
}
}
catch (Exception ex)
{
if (LOGGER.IsErrorEnabled)
{
LOGGER.Error(string.Format("BROADCAST_SERVER, failed to connect to [{0}] with address [{1}] and port {2}. Reason: {3}", message.SenderId, ep.Host, ep.Port, ex.Message));
}
}
}
else
{
if (LOGGER.IsInfoEnabled)
{
LOGGER.Info(string.Format("BROADCAST_SERVER, connecting to [{0}] with address [{1}] not allowed. IPV6 protocol disabled.", message.SenderId, ep.Host));
}
}
}
}
}
}
