public void ReportBreachOfProtocol(PeerInfo peerInfo, string details)
{
/* since the allocations can have the peers dynamically changed
* it may be hard for the external classes to ensure that the peerInfo is not null at the time when they report
* so we decide to check for null here and not consider the scenario to be exceptional
*/
if (peerInfo != null)
{
_stats.ReportSyncEvent(peerInfo.SyncPeer.Node, NodeStatsEventType.SyncFailed);
peerInfo.SyncPeer.Disconnect(DisconnectReason.BreachOfProtocol, details);
}
}
public void ReportWeakPeer(PeerInfo weakPeer, AllocationContexts allocationContexts)
{
if (weakPeer == null)
{
/* it may have just got disconnected and in such case the allocation would be nullified
* in such case there is no need to talk about whether the peer is good or bad
*/
return;
}
AllocationContexts sleeps = weakPeer.IncreaseWeakness(allocationContexts);
if (sleeps != AllocationContexts.None)
{
weakPeer.PutToSleep(sleeps, DateTime.UtcNow);
}
}
public void Cancel()
{
PeerInfo current = Current;
if (current == null)
{
return;
}
lock (_allocationLock)
{
current.Free(Contexts);
Current = null;
}
AllocationChangeEventArgs args = new AllocationChangeEventArgs(current, null);
Cancelled?.Invoke(this, args);
}
public void AddPeer(ISyncPeer syncPeer)
{
if (_logger.IsDebug)
{
_logger.Debug($"Adding sync peer {syncPeer.Node:c}");
}
if (!_isStarted)
{
if (_logger.IsDebug)
{
_logger.Debug($"Sync peer pool not started yet - adding peer is blocked: {syncPeer.Node:s}");
}
return;
}
if (_peers.ContainsKey(syncPeer.Node.Id))
{
if (_logger.IsDebug)
{
_logger.Debug($"Sync peer {syncPeer.Node:c} already in peers collection.");
}
return;
}
PeerInfo peerInfo = new PeerInfo(syncPeer);
_peers.TryAdd(syncPeer.Node.Id, peerInfo);
Metrics.SyncPeers = _peers.Count;
if (_logger.IsDebug)
{
_logger.Debug($"Adding {syncPeer.Node:c} to refresh queue");
}
if (NetworkDiagTracer.IsEnabled)
{
NetworkDiagTracer.ReportInterestingEvent(syncPeer.Node.Host, "adding node to refresh queue");
}
_peerRefreshQueue.Add(new RefreshTotalDiffTask {
SyncPeer = syncPeer
});
}
public void AllocateBestPeer(IEnumerable <PeerInfo> peers, INodeStatsManager nodeStatsManager, IBlockTree blockTree)
{
PeerInfo current = Current;
PeerInfo selected = _peerAllocationStrategy.Allocate(Current, peers, nodeStatsManager, blockTree);
if (selected == current)
{
return;
}
AllocationChangeEventArgs args;
lock (_allocationLock)
{
if (selected != null && selected.TryAllocate(Contexts))
{
Current = selected;
args = new AllocationChangeEventArgs(current, selected);
current?.Free(Contexts);
Replaced?.Invoke(this, args);
}
}
}
public void ReportNoSyncProgress(PeerInfo peerInfo, AllocationContexts allocationContexts)
{
ReportWeakPeer(peerInfo, allocationContexts);
}
internal void DropUselessPeers(bool force = false)
{
if (!force && DateTime.UtcNow - _lastUselessPeersDropTime < TimeSpan.FromSeconds(30))
{
// give some time to monitoring nodes
// (monitoring nodes are nodes that are investigating the network but are not synced themselves)
return;
}
if (_logger.IsTrace)
{
_logger.Trace($"Reviewing {PeerCount} peer usefulness");
}
int peersDropped = 0;
_lastUselessPeersDropTime = DateTime.UtcNow;
long ourNumber = _blockTree.BestSuggestedHeader?.Number ?? 0L;
UInt256 ourDifficulty = _blockTree.BestSuggestedHeader?.TotalDifficulty ?? UInt256.Zero;
foreach (PeerInfo peerInfo in AllPeers)
{
if (peerInfo.HeadNumber == 0 &&
peerInfo.IsInitialized &&
ourNumber != 0 &&
peerInfo.PeerClientType != PeerClientType.Nethermind)
// we know that Nethermind reports 0 HeadNumber when it is in sync (and it can still serve a lot of data to other nodes)
{
if (!CanBeUsefulForFastBlocks(peerInfo.HeadNumber))
{
peersDropped++;
peerInfo.SyncPeer.Disconnect(DisconnectReason.UselessPeer, "PEER REVIEW / HEAD 0");
}
}
else if (peerInfo.HeadNumber == 1920000 && _blockTree.ChainId == ChainId.Mainnet) // mainnet, stuck Geth nodes
{
if (!CanBeUsefulForFastBlocks(peerInfo.HeadNumber))
{
peersDropped++;
peerInfo.SyncPeer.Disconnect(DisconnectReason.UselessPeer, "PEER REVIEW / 1920000");
}
}
else if (peerInfo.HeadNumber == 7280022 && _blockTree.ChainId == ChainId.Mainnet) // mainnet, stuck Geth nodes
{
if (!CanBeUsefulForFastBlocks(peerInfo.HeadNumber))
{
peersDropped++;
peerInfo.SyncPeer.Disconnect(DisconnectReason.UselessPeer, "PEER REVIEW / 7280022");
}
}
else if (peerInfo.HeadNumber > ourNumber + 1024L && peerInfo.TotalDifficulty < ourDifficulty)
{
if (!CanBeUsefulForFastBlocks(MainnetSpecProvider.Instance.DaoBlockNumber ?? 0))
{
// probably Ethereum Classic nodes tht remain connected after we went pass the DAO
// worth to find a better way to discard them at the right time
peersDropped++;
peerInfo.SyncPeer.Disconnect(DisconnectReason.UselessPeer, "STRAY PEER");
}
}
}
if (PeerCount == PeerMaxCount)
{
long lowestBlockNumber = long.MaxValue;
PeerInfo worstPeer = null;
foreach (PeerInfo peerInfo in AllPeers)
{
if (peerInfo.HeadNumber < lowestBlockNumber)
{
lowestBlockNumber = peerInfo.HeadNumber;
worstPeer = peerInfo;
}
}
peersDropped++;
worstPeer?.SyncPeer.Disconnect(DisconnectReason.TooManyPeers, "PEER REVIEW / LOWEST NUMBER");
}
if (_logger.IsDebug)
{
_logger.Debug($"Dropped {peersDropped} useless peers");
}
}
private void AddPeerInfo(PeerInfo peerInfo)
{
_stringBuilder.Append($" {peerInfo}[{_stats.GetOrAdd(peerInfo.SyncPeer.Node).GetAverageTransferSpeed(TransferSpeedType.Latency) ?? 0}|{_stats.GetOrAdd(peerInfo.SyncPeer.Node).GetAverageTransferSpeed(TransferSpeedType.Headers) ?? 0}|{_stats.GetOrAdd(peerInfo.SyncPeer.Node).GetAverageTransferSpeed(TransferSpeedType.Bodies) ?? 0}|{_stats.GetOrAdd(peerInfo.SyncPeer.Node).GetAverageTransferSpeed(TransferSpeedType.Receipts) ?? 0}|{_stats.GetOrAdd(peerInfo.SyncPeer.Node).GetAverageTransferSpeed(TransferSpeedType.NodeData) ?? 0}]");
}
public SyncPeerAllocation(PeerInfo peerInfo, AllocationContexts contexts)
: this(new StaticStrategy(peerInfo), contexts)
{
}