public DhtManager(int localServicePort, IDhtConnectionManager connectionManager, NetProxy proxy, IEnumerable <EndPoint> ipv4BootstrapNodes, IEnumerable <EndPoint> ipv6BootstrapNodes, IEnumerable <EndPoint> torBootstrapNodes, string torOnionAddress, bool enableTorMode)
{
_localServicePort = localServicePort;
//init internet dht nodes
_ipv4InternetDhtNode = new DhtNode(connectionManager, new IPEndPoint(IPAddress.Any, localServicePort));
_ipv6InternetDhtNode = new DhtNode(connectionManager, new IPEndPoint(IPAddress.IPv6Any, localServicePort));
//add known bootstrap nodes
_ipv4InternetDhtNode.AddNode(ipv4BootstrapNodes);
_ipv6InternetDhtNode.AddNode(ipv6BootstrapNodes);
if (enableTorMode)
{
//init tor dht node
_torInternetDhtNode = new DhtNode(connectionManager, new DomainEndPoint(torOnionAddress, localServicePort));
//add known bootstrap nodes
_torInternetDhtNode.AddNode(torBootstrapNodes);
//set higher timeout value for internet and tor DHT nodes since they will be using tor network
_ipv4InternetDhtNode.QueryTimeout = 10000;
_ipv6InternetDhtNode.QueryTimeout = 10000;
_torInternetDhtNode.QueryTimeout = 10000;
}
else
{
//start network watcher
_networkWatcher = new Timer(NetworkWatcherAsync, null, 1000, NETWORK_WATCHER_INTERVAL);
}
//add bootstrap nodes via web
_bootstrapRetryTimer = new Timer(delegate(object state)
{
try
{
using (WebClientEx wC = new WebClientEx())
{
wC.Proxy = proxy;
wC.Timeout = 10000;
using (BinaryReader bR = new BinaryReader(new MemoryStream(wC.DownloadData(DHT_BOOTSTRAP_URL))))
{
int count = bR.ReadByte();
for (int i = 0; i < count; i++)
{
AddNode(EndPointExtension.Parse(bR));
}
}
}
//bootstrap success, stop retry timer
_bootstrapRetryTimer.Dispose();
}
catch (Exception ex)
{
Debug.Write(this.GetType().Name, ex);
}
}, null, BOOTSTRAP_RETRY_TIMER_INITIAL_INTERVAL, BOOTSTRAP_RETRY_TIMER_INTERVAL);
}
internal void RefreshBucket(DhtNode dhtNode)
{
List <KBucket> allLeafKBuckets = GetAllLeafKBuckets();
foreach (KBucket kBucket in allLeafKBuckets)
{
if (kBucket._contacts != null)
{
if ((DateTime.UtcNow - kBucket._lastChanged).TotalSeconds > BUCKET_STALE_TIMEOUT_SECONDS)
{
ThreadPool.QueueUserWorkItem(delegate(object state)
{
//get random node ID in the bucket range
BinaryNumber randomNodeID = BinaryNumber.GenerateRandomNumber256();
if (kBucket._bucketID != null)
{
randomNodeID = (randomNodeID >> kBucket._bucketDepth) | kBucket._bucketID;
}
//find closest contacts for current node id
NodeContact[] initialContacts = kBucket.GetKClosestContacts(randomNodeID, true);
if (initialContacts.Length > 0)
{
dhtNode.QueryFindNode(initialContacts, randomNodeID);
}
});
}
}
}
}
internal void CheckContactHealth(DhtNode dhtNode)
{
List <KBucket> allLeafKBuckets = GetAllLeafKBuckets();
foreach (KBucket kBucket in allLeafKBuckets)
{
NodeContact[] contacts = kBucket._contacts;
if (contacts != null)
{
foreach (NodeContact contact in contacts)
{
if ((contact != null) && contact.IsStale())
{
ThreadPool.QueueUserWorkItem(delegate(object state)
{
if (!dhtNode.Ping(contact))
{
//remove stale node contact
kBucket.RemoveStaleContact(contact);
}
});
}
}
}
}
}
public LocalNetworkDhtManager(NetworkInfo network)
{
_network = network;
//start udp & tcp listeners
switch (_network.LocalIP.AddressFamily)
{
case AddressFamily.InterNetwork:
_udpListener = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
_tcpListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
break;
case AddressFamily.InterNetworkV6:
_udpListener = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.Udp);
_tcpListener = new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp);
if ((Environment.OSVersion.Platform == PlatformID.Win32NT) && (Environment.OSVersion.Version.Major >= 6))
{
//windows vista & above
_udpListener.DualMode = true;
_tcpListener.DualMode = true;
}
break;
default:
throw new NotSupportedException("Address family not supported.");
}
_udpListener.EnableBroadcast = true;
_udpListener.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
_udpListener.Bind(new IPEndPoint(_network.LocalIP, LOCAL_DISCOVERY_ANNOUNCE_PORT));
_tcpListener.Bind(new IPEndPoint(_network.LocalIP, 0));
_tcpListener.Listen(10);
_dhtEndPoint = _tcpListener.LocalEndPoint as IPEndPoint;
//init dht node
_dhtNode = new DhtNode(this, _dhtEndPoint);
if (_udpListener.AddressFamily == AddressFamily.InterNetworkV6)
{
NetworkInterface nic = _network.Interface;
if ((nic.OperationalStatus == OperationalStatus.Up) && (nic.Supports(NetworkInterfaceComponent.IPv6)) && nic.SupportsMulticast)
{
try
{
_udpListener.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.AddMembership, new IPv6MulticastOption(IPAddress.Parse(IPV6_MULTICAST_IP), nic.GetIPProperties().GetIPv6Properties().Index));
}
catch (Exception ex)
{
Debug.Write(this.GetType().Name, ex);
}
}
}
//start reading packets
_udpListenerThread = new Thread(ReceiveUdpPacketAsync);
_udpListenerThread.IsBackground = true;
_udpListenerThread.Start();
//start accepting connections
_tcpListenerThread = new Thread(AcceptTcpConnectionAsync);
_tcpListenerThread.IsBackground = true;
_tcpListenerThread.Start();
//announce async
_announceTimer = new Timer(AnnounceAsync, null, 1000, ANNOUNCEMENT_INTERVAL);
}
