public NodeServer(Network network, ProtocolVersion version = ProtocolVersion.PROTOCOL_VERSION, int internalPort = -1)
{
this.AllowLocalPeers = true;
this.InboundNodeConnectionParameters = new NodeConnectionParameters();
internalPort = internalPort == -1 ? network.DefaultPort : internalPort;
this.localEndpoint = new IPEndPoint(IPAddress.Parse("0.0.0.0").MapToIPv6Ex(), internalPort);
this.MaxConnections = 125;
this.Network = network;
this.externalEndpoint = new IPEndPoint(this.localEndpoint.Address, this.Network.DefaultPort);
this.Version = version;
var listener = new EventLoopMessageListener <IncomingMessage>(ProcessMessage);
this.messageProducer.AddMessageListener(listener);
this.OwnResource(listener);
this.ConnectedNodes = new NodesCollection();
this.ConnectedNodes.Added += Nodes_NodeAdded;
this.ConnectedNodes.Removed += Nodes_NodeRemoved;
this.ConnectedNodes.MessageProducer.AddMessageListener(listener);
this.AllMessages = new MessageProducer <IncomingMessage>();
this.trace = new TraceCorrelation(NodeServerTrace.Trace, "Node server listening on " + this.LocalEndpoint);
}
public UPnPLease(int[] bitcoinPorts, int internalPort, string ruleName)
{
RuleName = ruleName;
_BitcoinPorts = bitcoinPorts;
_InternalPort = internalPort;
Trace = new TraceCorrelation(NodeServerTrace.Trace, "UPNP external address and port detection");
}
/// <summary>
/// Initializes instance of a network peer server.
/// </summary>
/// <param name="network">Specification of the network the node runs on - regtest/testnet/mainnet.</param>
/// <param name="version">Version of the network protocol that the server should run.</param>
/// <param name="internalPort">Port on which the server will listen, or -1 to use the default port for the selected network.</param>
/// <param name="dateTimeProvider">Provider of time functions.</param>
/// <param name="loggerFactory">Factory for creating loggers.</param>
/// <param name="networkPeerFactory">Factory for creating P2P network peers.</param>
public NetworkPeerServer(Network network, ProtocolVersion version, int internalPort, IDateTimeProvider dateTimeProvider, ILoggerFactory loggerFactory, INetworkPeerFactory networkPeerFactory)
{
internalPort = internalPort == -1 ? network.DefaultPort : internalPort;
this.logger = loggerFactory.CreateLogger(this.GetType().FullName, $"[{internalPort}] ");
this.dateTimeProvider = dateTimeProvider;
this.networkPeerFactory = networkPeerFactory;
this.AllowLocalPeers = true;
this.InboundNetworkPeerConnectionParameters = new NetworkPeerConnectionParameters();
this.localEndpoint = new IPEndPoint(IPAddress.Parse("0.0.0.0").MapToIPv6Ex(), internalPort);
this.MaxConnections = 125;
this.Network = network;
this.externalEndpoint = new IPEndPoint(this.localEndpoint.Address, this.Network.DefaultPort);
this.Version = version;
var listener = new EventLoopMessageListener <IncomingMessage>(ProcessMessage);
this.messageProducer.AddMessageListener(listener);
this.OwnResource(listener);
this.ConnectedNetworkPeers = new NetworkPeerCollection();
this.ConnectedNetworkPeers.Added += Peers_PeerAdded;
this.ConnectedNetworkPeers.Removed += Peers_PeerRemoved;
this.ConnectedNetworkPeers.MessageProducer.AddMessageListener(listener);
this.AllMessages = new MessageProducer <IncomingMessage>();
this.trace = new TraceCorrelation(NodeServerTrace.Trace, "Network peer server listening on " + this.LocalEndpoint);
}
public UPnPLease(int[] bitcoinPorts, int internalPort, string ruleName)
{
RuleName = ruleName;
_BitcoinPorts = bitcoinPorts;
_InternalPort = internalPort;
Trace = new TraceCorrelation(NodeServerTrace.Trace, "UPNP external address and port detection");
}
public async Task <string> Service1Method1(string param1)
{
try
{
var x = 1;
var y = 0;
if (y == 0)
{
return((x / y).ToString());
}
var correlationId = TraceCorrelation.GetCurrentActivityId();
ServiceEventSource.Current.ServiceRequestStart("Service1Method1", correlationId);
ServiceEventSource.Current.ServiceRequestStart1(correlationId, "Service1Method1");
var proxy = _statelessService2ProxyFactory.CreateSingletonServiceProxy();
var result = await proxy.Service2Method1(param1);
ServiceEventSource.Current.ServiceRequestStop("Service1Method1", correlationId);
return(result);
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
public void DisconnectAsync(string reason, Exception exception = null)
{
if (!IsConnected)
{
return;
}
if (Interlocked.CompareExchange(ref _Disconnecting, 1, 0) == 1)
{
return;
}
using (TraceCorrelation.Open())
{
NodeServerTrace.Information("Disconnection request " + reason);
State = NodeState.Disconnecting;
_Connection.Cancel.Cancel();
if (DisconnectReason == null)
{
DisconnectReason = new NodeDisconnectReason()
{
Reason = reason,
Exception = exception
}
}
;
}
}
public void VersionHandshake(CancellationToken cancellationToken = default(CancellationToken))
{
using (var listener = CreateListener()
.Where(p => p.Message.Payload is VersionPayload ||
p.Message.Payload is RejectPayload ||
p.Message.Payload is VerAckPayload))
{
using (TraceCorrelation.Open())
{
SendMessage(MyVersion);
var payload = listener.ReceivePayload <Payload>(cancellationToken);
if (payload is RejectPayload)
{
throw new InvalidOperationException("Handshake rejected : " + ((RejectPayload)payload).Reason);
}
var version = (VersionPayload)payload;
_PeerVersion = version;
Version = version.Version;
if (!version.AddressReceiver.Address.Equals(MyVersion.AddressFrom.Address))
{
NodeServerTrace.Warning("Different external address detected by the node " + version.AddressReceiver.Address + " instead of " + MyVersion.AddressFrom.Address);
}
if (version.Version < ProtocolVersion.MIN_PEER_PROTO_VERSION)
{
NodeServerTrace.Warning("Outdated version " + version.Version + " disconnecting");
Disconnect();
return;
}
SendMessage(new VerAckPayload());
listener.ReceivePayload <VerAckPayload>(cancellationToken);
State = NodeState.HandShaked;
}
}
}
internal static TraceCorrelation NewCorrelation(string activityName)
{
var correlation = new TraceCorrelation(_Trace, activityName);
_Trace.TraceInformation(activityName);
return(correlation);
}
public Chain BuildChain(Chain chain, CancellationToken cancellationToken = default(CancellationToken))
{
AssertState(NodeState.HandShaked, cancellationToken);
using (TraceCorrelation.Open())
{
NodeServerTrace.Information("Building chain");
if (FullVersion.StartHeight <= chain.Height)
{
NodeServerTrace.Information("Local chain already ahead");
return(chain);
}
while (chain.Height < FullVersion.StartHeight)
{
NodeServerTrace.Information("Chain progress : " + chain.Height + "/" + FullVersion.StartHeight);
SendMessage(new GetHeadersPayload()
{
BlockLocators = chain.Tip.GetLocator()
});
var headers = this.RecieveMessage <HeadersPayload>(cancellationToken);
foreach (var header in headers.Headers)
{
var prev = chain.GetBlock(header.HashPrevBlock);
if (prev == null || prev.Height != chain.Height)
{
NodeServerTrace.Error("Block Header received out of order " + header.GetHash(), null);
throw new InvalidOperationException("Block Header received out of order");
}
var chained = chain.CreateChainedBlock(header);
chain.SetTip(chained);
}
}
}
return(chain);
}
public async Task <string> Service2Method1(string param1)
{
var correlationId = TraceCorrelation.GetCurrentActivityId();
ServiceEventSource.Current.ServiceRequestStart("Service2 Method1 - Start; PARAM1: " + param1 + "; " + correlationId, correlationId);
await Service2PrivateMethod1();
ServiceEventSource.Current.ServiceRequestStop("Service2 Method1 - End; PARAM1: " + param1 + "; " + correlationId, correlationId);
return("Result from Service 2, Method 1");
}
public TK DoAction <T, TK>(T input)
{
var result = default(TK);
var correlationId = TraceCorrelation.GetCurrentActivityId();
ServiceEventSource.Current.ServiceRequestStart("Handler1 - Start; " + correlationId, correlationId);
Thread.Sleep(1000);
ServiceEventSource.Current.ServiceRequestStop("Handler1 - Stop; " + correlationId, correlationId);
return(result);
}
private async Task <string> Service2PrivateMethod1()
{
var correlationId = TraceCorrelation.GetCurrentActivityId();
ServiceEventSource.Current.ServiceRequestStart("Service2 Private Method1 - Start" + correlationId, correlationId);
Thread.Sleep(2000);
var result = Task.Run(
() => _commandContext.DoAction <int, bool>("Handler1", 5));
ServiceEventSource.Current.ServiceRequestStop("Service2 Private Method1 - End;" + correlationId, correlationId);
return("Result from Service 2, Method 1");
}
private void OnDisconnected()
{
if (Disconnected != null)
{
try
{
Disconnected(this);
}
catch (Exception ex)
{
TraceCorrelation.LogInside(() => NodeServerTrace.Error("Error while Disconnected event raised", ex));
}
}
}
private void OnStateChanged(NodeState previous)
{
if (StateChanged != null)
{
try
{
StateChanged(this, previous);
}
catch (Exception ex)
{
TraceCorrelation.LogInside(() => NodeServerTrace.Error("Error while Disconnected event raised", ex));
}
}
}
protected void OnMessageReceived(IncomingMessage message)
{
message.IfPayloadIs <VersionPayload>(version =>
{
if (State == NodeState.HandShaked)
{
if (message.Node.Version >= ProtocolVersion.REJECT_VERSION)
{
message.Node.SendMessageAsync(new RejectPayload()
{
Code = RejectCode.DUPLICATE
});
}
}
});
//if(version != null)
//{
// if((version.Services & NodeServices.NODE_WITNESS) != 0)
// _SupportedTransactionOptions |= TransactionOptions.Witness;
//}
//var havewitness = message.Message.Payload as HaveWitnessPayload;
//if(havewitness != null)
// _SupportedTransactionOptions |= TransactionOptions.Witness;
var last = new ActionFilter((m, n) =>
{
MessageProducer.PushMessage(m);
var messageReceived = MessageReceived;
if (messageReceived != null)
{
foreach (var handler in messageReceived.GetInvocationList().Cast <NodeEventMessageIncoming>())
{
try
{
handler.DynamicInvoke(this, m);
}
catch (TargetInvocationException ex)
{
TraceCorrelation.LogInside(() => NodeServerTrace.Error("Error while OnMessageReceived event raised", ex.InnerException), false);
}
}
}
});
var enumerator = Filters.Concat(new[] { last }).GetEnumerator();
FireFilters(enumerator, message);
}
public void RespondToHandShake(CancellationToken cancellation = default(CancellationToken))
{
using (TraceCorrelation.Open())
{
var listener = new PollMessageListener <IncomingMessage>();
using (MessageProducer.AddMessageListener(listener))
{
NodeServerTrace.Information("Responding to handshake");
SendMessage(MyVersion);
listener.ReceiveMessage().AssertPayload <VerAckPayload>();
SendMessage(new VerAckPayload());
_State = NodeState.HandShaked;
}
}
}
private void FireFilters(IEnumerator <INodeFilter> enumerator, IncomingMessage message)
{
if (enumerator.MoveNext())
{
var filter = enumerator.Current;
try
{
filter.OnReceivingMessage(message, () => FireFilters(enumerator, message));
}
catch (Exception ex)
{
TraceCorrelation.LogInside(() => NodeServerTrace.Error("Unhandled exception raised by a node filter (OnReceivingMessage)", ex.InnerException), false);
}
}
}
internal Node(Peer peer, NodeServer nodeServer, Socket socket, VersionPayload version)
{
_Peer = peer;
_NodeServer = nodeServer;
_Connection = new NodeConnection(this, socket);
_FullVersion = version;
Version = version.Version;
LastSeen = peer.NetworkAddress.Time;
TraceCorrelation.LogInside(() =>
{
NodeServerTrace.Information("Connected to advertised node " + _Peer.NetworkAddress.Endpoint);
State = NodeState.Connected;
});
_Connection.BeginListen();
}
public async Task <IHttpActionResult> MethodQueue(string param1)
{
var correlationId = TraceCorrelation.RetrieveCorrelationInfo();
var absoluteUrl = Request?.RequestUri?.AbsoluteUri;
//var requestTypeToLog = absoluteUrl + "; Param1: " + param1 +"; " + correlationId;
WebApiEventSource.Current.ServiceRequestStart(absoluteUrl, correlationId, "One");
var serviceProxy = _queueProxy.CreateSingletonServiceProxy();
await serviceProxy.StartScheduledMaterializedViewProcessing(param1);
WebApiEventSource.Current.ServiceRequestStop(absoluteUrl, correlationId);
return(Ok("Return from API method 1"));
}
private void FireFilters(IEnumerator <INodeFilter> enumerator, Object payload)
{
if (enumerator.MoveNext())
{
var filter = enumerator.Current;
try
{
filter.OnSendingMessage(this, payload, () => FireFilters(enumerator, payload));
}
catch (Exception ex)
{
TraceCorrelation.LogInside(() => NodeServerTrace.Error("Unhandled exception raised by a node filter (OnSendingMessage)", ex.InnerException), false);
}
}
}
public void Disconnect()
{
if (State < NodeState.Connected)
{
_Connection.Disconnected.WaitOne();
return;
}
using (TraceCorrelation.Open())
{
NodeServerTrace.Information("Disconnection request");
State = NodeState.Disconnecting;
_Connection.Cancel.Cancel();
_Connection.Disconnected.WaitOne();
}
}
public Chain BuildChain(ObjectStream <ChainChange> changes = null, CancellationToken cancellationToken = default(CancellationToken))
{
if (changes == null)
{
changes = new StreamObjectStream <ChainChange>();
}
var chain = new Chain(Network, changes);
TraceCorrelation trace = new TraceCorrelation(NodeServerTrace.Trace, "Build chain");
using (trace.Open())
{
using (var pool = CreateNodeSet(3))
{
int height = pool.GetNodes().Max(o => o.FullVersion.StartHeight);
var listener = new PollMessageListener <IncomingMessage>();
pool.SendMessage(new GetHeadersPayload()
{
BlockLocators = chain.Tip.GetLocator()
});
using (pool.MessageProducer.AddMessageListener(listener))
{
while (chain.Height != height)
{
var before = chain.Tip;
var headers = listener.RecieveMessage(cancellationToken).Message.Payload as HeadersPayload;
if (headers != null)
{
foreach (var header in headers.Headers)
{
chain.GetOrAdd(header);
}
if (before.HashBlock != chain.Tip.HashBlock)
{
NodeServerTrace.Information("Chain progress : " + chain.Height + "/" + height);
pool.SendMessage(new GetHeadersPayload()
{
BlockLocators = chain.Tip.GetLocator()
});
}
}
}
}
}
}
return(chain);
}
public IEnumerable <Block> GetBlocks(IEnumerable <uint256> neededBlocks, CancellationToken cancellationToken = default(CancellationToken))
{
AssertState(NodeState.HandShaked, cancellationToken);
using (TraceCorrelation.Open())
{
NodeServerTrace.Information("Downloading blocks");
int simultaneous = 70;
PerformanceSnapshot lastSpeed = null;
using (var listener = CreateListener()
.OfType <BlockPayload>())
{
foreach (var invs in neededBlocks
.Select(b => new InventoryVector()
{
Type = InventoryType.MSG_BLOCK,
Hash = b
})
.Partition(simultaneous))
{
NodeServerTrace.Information("Speed " + lastSpeed);
var begin = Counter.Snapshot();
var invsByHash = invs.ToDictionary(k => k.Hash);
this.SendMessage(new GetDataPayload(invs.ToArray()));
Block[] downloadedBlocks = new Block[invs.Count];
while (invsByHash.Count != 0)
{
var block = listener.ReceivePayload <BlockPayload>(cancellationToken).Object;
var thisHash = block.GetHash();
if (invsByHash.ContainsKey(thisHash))
{
downloadedBlocks[invs.IndexOf(invsByHash[thisHash])] = block;
invsByHash.Remove(thisHash);
}
}
var end = Counter.Snapshot();
lastSpeed = end - begin;
foreach (var downloadedBlock in downloadedBlocks)
{
yield return(downloadedBlock);
}
}
}
}
}
/// <summary>
/// Handles the exception
/// </summary>
/// <param name="context"></param>
public override void Handle(ExceptionHandlerContext context)
{
var exception = context.Exception;
if (context.Handle(exception))
{
return;
}
var correlationId = TraceCorrelation.RetrieveCorrelationInfo();
if (exception.InnerException != null)
{
var errorMessage = exception.InnerException.Message;
var stackTrace = exception.InnerException.StackTrace ?? "No stack trace available";
}
}
public NodeServer(Network network, ProtocolVersion version = ProtocolVersion.PROTOCOL_VERSION,
int internalPort = -1)
{
AdvertizeMyself = true;
internalPort = internalPort == -1 ? network.DefaultPort : internalPort;
_LocalEndpoint = new IPEndPoint(IPAddress.Parse("0.0.0.0").MapToIPv6(), internalPort);
_Network = network;
_ExternalEndpoint = new IPEndPoint(_LocalEndpoint.Address, Network.DefaultPort);
_Version = version;
var listener = new EventLoopMessageListener<IncomingMessage>(ProcessMessage);
_MessageProducer.AddMessageListener(listener);
OwnResource(listener);
RegisterPeerTableRepository(_PeerTable);
_Nodes = new NodeSet();
_Nodes.MessageProducer.AddMessageListener(listener);
_Trace = new TraceCorrelation(NodeServerTrace.Trace, "Node server listening on " + LocalEndpoint);
}
public bool AdvertiseMyself()
{
if (NodeServer.IsListening && NodeServer.ExternalEndpoint.Address.IsRoutable(NodeServer.AllowLocalPeers))
{
TraceCorrelation.LogInside(() => NodeServerTrace.Information("Advertizing myself"));
SendMessage(new AddrPayload(new NetworkAddress()
{
Ago = TimeSpan.FromSeconds(0),
Endpoint = NodeServer.ExternalEndpoint
}));
return(true);
}
else
{
return(false);
}
}
void ProcessMessage(IncomingMessage message)
{
AllMessages.PushMessage(message);
TraceCorrelation trace = null;
if (message.Node != null)
{
trace = message.Node.TraceCorrelation;
}
else
{
trace = new TraceCorrelation(NodeServerTrace.Trace, "Processing inbound message " + message.Message);
}
using (trace.Open(false))
{
ProcessMessageCore(message);
}
}
public NodeServer(Network network, ProtocolVersion version = ProtocolVersion.PROTOCOL_VERSION,
int internalPort = -1)
{
AdvertizeMyself = false;
internalPort = internalPort == -1 ? network.DefaultPort : internalPort;
_LocalEndpoint = new IPEndPoint(IPAddress.Parse("0.0.0.0").MapToIPv6(), internalPort);
_Network = network;
_ExternalEndpoint = new IPEndPoint(_LocalEndpoint.Address, Network.DefaultPort);
_Version = version;
var listener = new EventLoopMessageListener <IncomingMessage>(ProcessMessage);
_MessageProducer.AddMessageListener(listener);
OwnResource(listener);
RegisterPeerTableRepository(_PeerTable);
_Nodes = new NodeSet();
_Nodes.MessageProducer.AddMessageListener(listener);
_Trace = new TraceCorrelation(NodeServerTrace.Trace, "Node server listening on " + LocalEndpoint);
}
public NodeServer(NetworkInfo network, ProtocolVersion version = ProtocolVersion.PROTOCOL_VERSION, int internalPort = -1)
{
AllowLocalPeers = true;
InboundNodeConnectionParameters = new NodeConnectionParameters();
internalPort = internalPort == -1 ? network.DefaultPort : internalPort;
_LocalEndpoint = new IPEndPoint(IPAddress.Parse("0.0.0.0").MapToIPv6Ex(), internalPort);
_Network = network;
//_ExternalEndpoint = new IPEndPoint(_LocalEndpoint.Address, Network.DefaultPort); //TODO
_Version = version;
var listener = new EventLoopMessageListener <IncomingMessage>(ProcessMessage);
_MessageProducer.AddMessageListener(listener);
OwnResource(listener);
_ConnectedNodes = new NodesCollection();
_ConnectedNodes.Added += _Nodes_NodeAdded;
_ConnectedNodes.Removed += _Nodes_NodeRemoved;
_ConnectedNodes.MessageProducer.AddMessageListener(listener);
_Trace = new TraceCorrelation(NodeServerTrace.Trace, "Node server listening on " + LocalEndpoint);
}
/// <summary>
///
/// </summary>
/// <param name="cancellation"></param>
public void RespondToHandShake(CancellationToken cancellation = default(CancellationToken))
{
using (TraceCorrelation.Open())
{
using (var list = CreateListener().Where(m => m.IsPayloadTypeOf(typeof(VerAckPayload), typeof(RejectPayload))))
{
NodeServerTrace.Information("Responding to handshake");
SendMessageAsync(MyVersion);
var message = list.ReceiveMessage(cancellation);
message.IfPayloadIs <RejectPayload>(reject =>
{
throw new ProtocolException("Version rejected " + reject.Code + " : " + reject.Reason);
});
SendMessageAsync(new VerAckPayload());
State = NodeState.HandShaked;
}
}
}
private void OnStateChanged(NodeState previous)
{
var stateChanged = StateChanged;
if (stateChanged != null)
{
foreach (var handler in stateChanged.GetInvocationList().Cast <NodeStateEventHandler>())
{
try
{
handler.DynamicInvoke(this, previous);
}
catch (TargetInvocationException ex)
{
TraceCorrelation.LogInside(() => NodeServerTrace.Error("Error while StateChanged event raised", ex.InnerException));
}
}
}
}
private void OnDisconnected()
{
var disconnected = Disconnected;
if (disconnected != null)
{
foreach (var handler in disconnected.GetInvocationList().Cast <NodeEventHandler>())
{
try
{
handler.DynamicInvoke(this);
}
catch (TargetInvocationException ex)
{
TraceCorrelation.LogInside(() => NodeServerTrace.Error("Error while Disconnected event raised", ex.InnerException));
}
}
}
}
public NodeServer(Network network, ProtocolVersion version = ProtocolVersion.PROTOCOL_VERSION,
int internalPort = -1)
{
AllowLocalPeers = true;
InboundNodeConnectionParameters = new NodeConnectionParameters();
internalPort = internalPort == -1 ? network.DefaultPort : internalPort;
_LocalEndpoint = new IPEndPoint(IPAddress.Parse("0.0.0.0").MapToIPv6Ex(), internalPort);
_Network = network;
_ExternalEndpoint = new IPEndPoint(_LocalEndpoint.Address, Network.DefaultPort);
_Version = version;
var listener = new EventLoopMessageListener<IncomingMessage>(ProcessMessage);
_MessageProducer.AddMessageListener(listener);
OwnResource(listener);
_ConnectedNodes = new NodesCollection();
_ConnectedNodes.Added += _Nodes_NodeAdded;
_ConnectedNodes.Removed += _Nodes_NodeRemoved;
_ConnectedNodes.MessageProducer.AddMessageListener(listener);
_Trace = new TraceCorrelation(NodeServerTrace.Trace, "Node server listening on " + LocalEndpoint);
}
internal static TraceCorrelation NewCorrelation(string activityName)
{
var correlation = new TraceCorrelation(_Trace, activityName);
_Trace.TraceInformation(activityName);
return correlation;
}
internal void DiscoverPeers(Network network, NodeConnectionParameters parameters)
{
int peerToFind = 1000;
TraceCorrelation traceCorrelation = new TraceCorrelation(NodeServerTrace.Trace, "Discovering nodes");
int found = 0;
using(traceCorrelation.Open())
{
while(found < peerToFind)
{
parameters.ConnectCancellation.ThrowIfCancellationRequested();
NodeServerTrace.PeerTableRemainingPeerToGet(-found + peerToFind);
List<NetworkAddress> peers = new List<NetworkAddress>();
peers.AddRange(this.GetAddr());
if(peers.Count == 0)
{
PopulateTableWithDNSNodes(network, peers);
PopulateTableWithHardNodes(network, peers);
peers = new List<NetworkAddress>(peers.OrderBy(a => RandomUtils.GetInt32()));
}
CancellationTokenSource peerTableFull = new CancellationTokenSource();
CancellationToken loopCancel = CancellationTokenSource.CreateLinkedTokenSource(peerTableFull.Token, parameters.ConnectCancellation).Token;
try
{
Parallel.ForEach(peers, new ParallelOptions()
{
MaxDegreeOfParallelism = 5,
CancellationToken = loopCancel,
}, p =>
{
CancellationTokenSource timeout = new CancellationTokenSource(TimeSpan.FromSeconds(5));
var cancelConnection = CancellationTokenSource.CreateLinkedTokenSource(timeout.Token, loopCancel);
Node n = null;
try
{
var param2 = parameters.Clone();
param2.ConnectCancellation = cancelConnection.Token;
var addrman = param2.TemplateBehaviors.Find<AddressManagerBehavior>();
param2.TemplateBehaviors.Clear();
param2.TemplateBehaviors.Add(addrman);
n = Node.Connect(network, p.Endpoint, param2);
n.VersionHandshake(cancelConnection.Token);
n.MessageReceived += (s, a) =>
{
var addr = (a.Message.Payload as AddrPayload);
if(addr != null)
{
Interlocked.Add(ref found, addr.Addresses.Length);
if(found >= peerToFind)
peerTableFull.Cancel();
}
};
n.SendMessageAsync(new GetAddrPayload());
loopCancel.WaitHandle.WaitOne(2000);
}
catch
{
}
finally
{
if(n != null)
n.DisconnectAsync();
}
if(found >= peerToFind)
peerTableFull.Cancel();
else
NodeServerTrace.Information("Need " + (-found + peerToFind) + " more peers");
});
}
catch(OperationCanceledException)
{
if(parameters.ConnectCancellation.IsCancellationRequested)
throw;
}
}
}
}
public Chain BuildChain(ObjectStream<ChainChange> changes = null, CancellationToken cancellationToken = default(CancellationToken))
{
if(changes == null)
changes = new StreamObjectStream<ChainChange>();
var chain = new Chain(Network, changes);
TraceCorrelation trace = new TraceCorrelation(NodeServerTrace.Trace, "Build chain");
using(trace.Open())
{
using(var pool = CreateNodeSet(3))
{
int height = pool.GetNodes().Max(o => o.FullVersion.StartHeight);
var listener = new PollMessageListener<IncomingMessage>();
pool.SendMessage(new GetHeadersPayload()
{
BlockLocators = chain.Tip.GetLocator()
});
using(pool.MessageProducer.AddMessageListener(listener))
{
while(chain.Height != height)
{
var before = chain.Tip;
var headers = listener.RecieveMessage(cancellationToken).Message.Payload as HeadersPayload;
if(headers != null)
{
foreach(var header in headers.Headers)
{
chain.GetOrAdd(header);
}
if(before.HashBlock != chain.Tip.HashBlock)
{
NodeServerTrace.Information("Chain progress : " + chain.Height + "/" + height);
pool.SendMessage(new GetHeadersPayload()
{
BlockLocators = chain.Tip.GetLocator()
});
}
}
}
}
}
}
return chain;
}
public NodeSet CreateNodeSet(int size)
{
if(size > 1000)
throw new ArgumentOutOfRangeException("size", "size should be less than 1000");
TraceCorrelation trace = new TraceCorrelation(NodeServerTrace.Trace, "Creating node set of size " + size);
NodeSet set = new NodeSet();
using(trace.Open())
{
while(set.Count() < size)
{
var peerToGet = size - set.Count();
var activePeers = PeerTable.GetActivePeers(1000);
activePeers = activePeers.Where(p => !set.Contains(p.NetworkAddress.Endpoint)).ToArray();
if(activePeers.Length < peerToGet)
{
DiscoverPeers(size);
continue;
}
NodeServerTrace.Information("Need " + peerToGet + " more nodes");
BlockingCollection<Node> handshakedNodes = new BlockingCollection<Node>(peerToGet);
CancellationTokenSource handshakedFull = new CancellationTokenSource();
try
{
Parallel.ForEach(activePeers,
new ParallelOptions()
{
MaxDegreeOfParallelism = 10,
CancellationToken = handshakedFull.Token
}, p =>
{
if(set.Contains(p.NetworkAddress.Endpoint))
return;
Node node = null;
try
{
node = GetNodeByPeer(p, handshakedFull.Token);
node.VersionHandshake(handshakedFull.Token);
if(node != null && node.State != NodeState.HandShaked)
node.Disconnect();
if(!handshakedNodes.TryAdd(node))
{
handshakedFull.Cancel();
node.Disconnect();
}
else
{
var remaining = (size - set.Count() - handshakedNodes.Count);
if(remaining == 0)
{
handshakedFull.Cancel();
}
else
NodeServerTrace.Information("Need " + remaining + " more nodes");
}
}
catch(Exception)
{
if(node != null)
node.Disconnect();
}
});
}
catch(OperationCanceledException)
{
}
set.AddNodes(handshakedNodes.ToArray());
}
}
return set;
}
/// <summary>
/// Fill the PeerTable with fresh addresses
/// </summary>
public void DiscoverPeers(int peerToFind = 990)
{
TraceCorrelation traceCorrelation = new TraceCorrelation(NodeServerTrace.Trace, "Discovering nodes");
List<Task> tasks = new List<Task>();
using(traceCorrelation.Open())
{
while(CountPeerRequired(peerToFind) != 0)
{
NodeServerTrace.PeerTableRemainingPeerToGet(CountPeerRequired(peerToFind));
CancellationTokenSource cancellation = new CancellationTokenSource(TimeSpan.FromSeconds(40));
var peers = PeerTable.GetActivePeers(1000);
if(peers.Length == 0)
{
PopulateTableWithDNSNodes();
PopulateTableWithHardNodes();
peers = PeerTable.GetActivePeers(1000);
}
CancellationTokenSource peerTableFull = new CancellationTokenSource();
NodeSet connected = new NodeSet();
try
{
Parallel.ForEach(peers, new ParallelOptions()
{
MaxDegreeOfParallelism = 5,
CancellationToken = peerTableFull.Token,
}, p =>
{
Node n = null;
try
{
n = GetNodeByPeer(p, cancellation.Token);
if(n.State < NodeState.HandShaked)
{
connected.AddNode(n);
n.VersionHandshake(cancellation.Token);
}
n.SendMessage(new GetAddrPayload());
Thread.Sleep(2000);
}
catch(Exception)
{
if(n != null)
n.Disconnect();
}
if(CountPeerRequired(peerToFind) == 0)
peerTableFull.Cancel();
else
NodeServerTrace.Information("Need " + CountPeerRequired(peerToFind) + " more peers");
});
}
catch(OperationCanceledException)
{
}
finally
{
connected.DisconnectAll();
}
}
NodeServerTrace.Trace.TraceInformation("Peer table is now full");
}
}
void ProcessMessage(IncomingMessage message)
{
AllMessages.PushMessage(message);
TraceCorrelation trace = null;
if(message.Node != null)
{
trace = message.Node.TraceCorrelation;
}
else
{
trace = new TraceCorrelation(NodeServerTrace.Trace, "Processing inbound message " + message.Message);
}
using(trace.Open(false))
{
ProcessMessageCore(message);
}
}