public int Compare(Peer x, Peer y)
{
if (x == null)
{
return(y == null ? 0 : 1);
}
if (y == null)
{
return(-1);
}
int staticValue = -x.Node.IsStatic.CompareTo(y.Node.IsStatic);
if (staticValue != 0)
{
return(staticValue);
}
int trust = -x.Node.IsTrusted.CompareTo(y.Node.IsTrusted);
if (trust != 0)
{
return(trust);
}
int reputation = -_stats.GetCurrentReputation(x.Node).CompareTo(_stats.GetCurrentReputation(y.Node));
return(reputation);
}
private async Task SetupPeerConnection(Peer peer)
{
// Can happen when In connection is received from the same peer and is initialized before we get here
// In this case we do not initialize OUT connection
if (!AddActivePeer(peer.Node.Id, peer, "upgrading candidate"))
{
if (_logger.IsTrace)
{
_logger.Trace($"Active peer was already added to collection: {peer.Node.Id}");
}
return;
}
Interlocked.Increment(ref _tryCount);
Interlocked.Increment(ref _pending);
bool result = await InitializePeerConnection(peer);
// for some time we will have a peer in active that has no session assigned - analyze this?
Interlocked.Decrement(ref _pending);
if (_logger.IsTrace)
{
_logger.Trace($"Connecting to {_stats.GetCurrentReputation(peer.Node)} rep node - {result}, ACTIVE: {_activePeers.Count}, CAND: {_peerPool.CandidatePeerCount}");
}
if (!result)
{
_stats.ReportEvent(peer.Node, NodeStatsEventType.ConnectionFailed);
Interlocked.Increment(ref _failedInitialConnect);
if (peer.OutSession != null)
{
if (_logger.IsTrace)
{
_logger.Trace($"Timeout, doing additional disconnect: {peer.Node.Id}");
}
peer.OutSession?.MarkDisconnected(DisconnectReason.ReceiveMessageTimeout, DisconnectType.Local, "timeout");
}
peer.IsAwaitingConnection = false;
DeactivatePeerIfDisconnected(peer, "Failed to initialize connections");
return;
}
Interlocked.Increment(ref _newActiveNodes);
}
public void Can_sort_by_Reputation()
{
Node a = new Node(TestItem.PublicKeyA, "127.0.0.1", 30303);
Peer peerA = new Peer(a);
Node b = new Node(TestItem.PublicKeyB, "127.0.0.1", 30303);
Peer peerB = new Peer(b);
Node c = new Node(TestItem.PublicKeyC, "127.0.0.1", 30303);
Peer peerC = new Peer(c);
_statsManager.GetCurrentReputation(a).Returns(100);
_statsManager.GetCurrentReputation(b).Returns(50);
_statsManager.GetCurrentReputation(c).Returns(200);
Assert.AreEqual(-1, _comparer.Compare(peerA, peerB));
Assert.AreEqual(1, _comparer.Compare(peerA, peerC));
Assert.AreEqual(1, _comparer.Compare(peerB, peerC));
Assert.AreEqual(0, _comparer.Compare(peerA, peerA));
Assert.AreEqual(0, _comparer.Compare(peerB, peerB));
Assert.AreEqual(0, _comparer.Compare(peerC, peerC));
}
private (IReadOnlyCollection <Peer> Candidates, IDictionary <ActivePeerSelectionCounter, int> Counters, IReadOnlyCollection <Peer> IncompatiblePeers) SelectAndRankCandidates()
{
var counters = Enum.GetValues(typeof(ActivePeerSelectionCounter)).OfType <ActivePeerSelectionCounter>().ToDictionary(x => x, y => 0);
var availableActiveCount = _networkConfig.ActivePeersMaxCount - _activePeers.Count;
if (availableActiveCount <= 0)
{
return(Array.Empty <Peer>(), counters, Array.Empty <Peer>());
}
var candidatesSnapshot = _candidatePeers.Where(x => !_activePeers.ContainsKey(x.Key)).ToArray();
if (!candidatesSnapshot.Any())
{
return(Array.Empty <Peer>(), counters, Array.Empty <Peer>());
}
counters[ActivePeerSelectionCounter.AllNonActiveCandidates] = candidatesSnapshot.Length;
List <Peer> candidates = new List <Peer>();
List <Peer> incompatiblePeers = new List <Peer>();
for (int i = 0; i < candidatesSnapshot.Length; i++)
{
var candidate = candidatesSnapshot[i];
if (candidate.Value.Node.Port == 0)
{
counters[ActivePeerSelectionCounter.FilteredByZeroPort] = counters[ActivePeerSelectionCounter.FilteredByZeroPort] + 1;
continue;
}
var delayResult = _stats.IsConnectionDelayed(candidate.Value.Node);
if (delayResult.Result)
{
if (delayResult.DelayReason == NodeStatsEventType.Disconnect)
{
counters[ActivePeerSelectionCounter.FilteredByDisconnect] = counters[ActivePeerSelectionCounter.FilteredByDisconnect] + 1;
}
else if (delayResult.DelayReason == NodeStatsEventType.ConnectionFailed)
{
counters[ActivePeerSelectionCounter.FilteredByFailedConnection] = counters[ActivePeerSelectionCounter.FilteredByFailedConnection] + 1;
}
continue;
}
if (_stats.FindCompatibilityValidationResult(candidate.Value.Node).HasValue)
{
incompatiblePeers.Add(candidate.Value);
continue;
}
if (!PeerIsDisconnected(candidate.Value))
{
// in transition
continue;
}
candidates.Add(candidate.Value);
}
return(candidates.OrderBy(x => x.Node.IsTrusted).ThenByDescending(x => _stats.GetCurrentReputation(x.Node)).ToList(), counters, incompatiblePeers);
}