/// <summary>
/// Adds a node to the -addnode collection.
/// <para>
/// Usually called via RPC.
/// </para>
/// </summary>
/// <param name="ipEndpoint">The endpoint of the peer to add.</param>
public void AddNodeAddress(IPEndPoint ipEndpoint, bool excludeFromIpRangeFiltering = false)
{
Guard.NotNull(ipEndpoint, nameof(ipEndpoint));
if (excludeFromIpRangeFiltering && !this.ipRangeFilteringEndpointExclusions.Any(ip => ip.Match(ipEndpoint)))
{
this.logger.LogDebug("{0} will be excluded from IP range filtering.", ipEndpoint);
this.ipRangeFilteringEndpointExclusions.Add(ipEndpoint);
}
this.peerAddressManager.AddPeer(ipEndpoint.MapToIpv6(), IPAddress.Loopback);
if (!this.ConnectionSettings.RetrieveAddNodes().Any(p => p.Match(ipEndpoint)))
{
this.ConnectionSettings.AddAddNode(ipEndpoint);
IPeerConnector addNodeConnector = this.PeerConnectors.FirstOrDefault(pc => pc is PeerConnectorAddNode);
if (addNodeConnector != null)
{
addNodeConnector.MaxOutboundConnections++;
}
}
else
{
this.logger.LogDebug("The endpoint already exists in the add node collection.");
}
}
/// <inheritdoc />
public void UpdateAndAssignMyExternalAddress(IPEndPoint ipEndPoint, bool suppliedEndPointIsFinal,
int ipEndPointScore = 0)
{
lock (this.lockObject)
{
if (suppliedEndPointIsFinal)
{
this.MyExternalAddress = ipEndPoint;
this.IsMyExternalAddressFinal = true;
this.logger.LogTrace("(-)[SUPPLIED_FINAL]");
return;
}
if (this.IsMyExternalAddressFinal)
{
this.logger.LogTrace("(-)[EXISTING_FINAL]");
return;
}
// If it was the same as value that was there we just increment the score by 1.
// Only the address portion is comparable, the port will be an ephemeral port != our server port if this is an outbound connection. So we replace it later with our configured port for self endpoint tracking.
if (ipEndPoint.MapToIpv6().Address.Equals(this.MyExternalAddress.MapToIpv6().Address))
{
this.MyExternalAddressPeerScore += 1;
this.logger.LogTrace("(-)[SUPPLIED_EXISTING]");
return;
}
// If it was different we decrement the score by 1.
this.MyExternalAddressPeerScore -= 1;
this.logger.LogDebug("Different endpoint '{0}' supplied. Score decremented to {1}.", ipEndPoint,
this.MyExternalAddressPeerScore);
// If the new score is 0 we replace the old one with the new one with score 1.
if (this.MyExternalAddressPeerScore <= 0)
{
var replacementEndpoint = new IPEndPoint(ipEndPoint.MapToIpv6().Address, this.MyExternalPort);
this.logger.LogDebug(
"Score for old endpoint '{0}' is <= 0. Updating endpoint to '{1}' and resetting peer score to 1.",
this.MyExternalAddress, replacementEndpoint);
this.MyExternalAddress = replacementEndpoint;
this.MyExternalAddressPeerScore = 1;
}
}
}
/// <summary>
/// Creates a new peer address instance.
/// </summary>
/// <param name="endPoint">The end point of the peer.</param>
public static PeerAddress Create(IPEndPoint endPoint)
{
return(new PeerAddress
{
ConnectionAttempts = 0,
Endpoint = endPoint.MapToIpv6(),
loopback = IPAddress.Loopback.ToString()
});
}
public void UpdateWithSameExternalAddress_IsNotFinal_ExternalAddressIsUnchanged_AndPeerScoreIsIncremented()
{
var oldIpEndpoint = new IPEndPoint(IPAddress.Parse("1.2.3.4"), 1234);
const int initialPeerScore = 1;
this.selfEndpointTracker.UpdateAndAssignMyExternalAddress(oldIpEndpoint, false);
this.selfEndpointTracker.UpdateAndAssignMyExternalAddress(oldIpEndpoint, false);
Assert.True(this.selfEndpointTracker.MyExternalAddress.Address.Equals(oldIpEndpoint.MapToIpv6().Address));
Assert.Equal(initialPeerScore + 1, this.selfEndpointTracker.MyExternalAddressPeerScore);
}
private void AddPeerWithoutCleanup(IPEndPoint endPoint, IPAddress source)
{
if (!endPoint.Address.IsRoutable(true))
{
return;
}
IPEndPoint ipv6EndPoint = endPoint.MapToIpv6();
PeerAddress peerToAdd = PeerAddress.Create(ipv6EndPoint, source.MapToIPv6());
this.peerInfoByPeerAddress.TryAdd(ipv6EndPoint, peerToAdd);
}
public void Ensure_IPGroups_Are_Filtered()
{
var ipAddress100 = IPAddress.Parse("::ffff:100.50.0.3");
var endPoint100 = new IPEndPoint(ipAddress100, 80);
var ipAddress100_2 = IPAddress.Parse("::ffff:100.67.0.3");
var endPoint100_2 = new IPEndPoint(ipAddress100_2, 80);
byte[] endPoint100Group = endPoint100.MapToIpv6().Address.GetGroup();
byte[] endPoint100_2Group = endPoint100_2.MapToIpv6().Address.GetGroup();
Assert.False(endPoint100_2Group.SequenceEqual(endPoint100Group));
}
/// <summary>
/// Adds a node to the -addnode collection.
/// <para>
/// Usually called via RPC.
/// </para>
/// </summary>
/// <param name="ipEndpoint">The endpoint of the peer to add.</param>
public void AddNodeAddress(IPEndPoint ipEndpoint)
{
Guard.NotNull(ipEndpoint, nameof(ipEndpoint));
this.peerAddressManager.AddPeer(ipEndpoint.MapToIpv6(), IPAddress.Loopback);
if (!this.ConnectionSettings.AddNode.Any(p => p.Match(ipEndpoint)))
{
this.ConnectionSettings.AddNode.Add(ipEndpoint);
this.PeerConnectors.FirstOrDefault(pc => pc is PeerConnectorAddNode).MaxOutboundConnections++;
}
else
this.logger.LogTrace("The endpoint already exists in the add node collection.");
}
/// <summary>
/// Determines if the peer should be disconnected.
/// Peer should be disconnected in case it's IP is from the same group in which any other peer
/// is and the peer wasn't added using -connect or -addNode command line arguments.
/// </summary>
private bool CheckIfPeerFromSameNetworkGroup(IReadOnlyNetworkPeerCollection networkPeers, IPEndPoint ipEndpoint, List <IPEndPoint> iprangeFilteringExclusions)
{
// Don't disconnect if range filtering is not turned on.
if (!this.connectionManagerSettings.IpRangeFiltering)
{
this.logger.LogTrace("(-)[IP_RANGE_FILTERING_OFF]:false");
return(false);
}
// Don't disconnect if this peer has a local host address.
if (ipEndpoint.Address.IsLocal())
{
this.logger.LogTrace("(-)[IP_IS_LOCAL]:false");
return(false);
}
// Don't disconnect if this peer is in -addnode or -connect.
if (this.connectionManagerSettings.RetrieveAddNodes().Union(this.connectionManagerSettings.Connect).Any(ep => ipEndpoint.MatchIpOnly(ep)))
{
this.logger.LogTrace("(-)[ADD_NODE_OR_CONNECT]:false");
return(false);
}
// Don't disconnect if this peer is in the exclude from IP range filtering group.
if (iprangeFilteringExclusions.Any(ip => ip.MatchIpOnly(ipEndpoint)))
{
this.logger.LogTrace("(-)[PEER_IN_IPRANGEFILTER_EXCLUSIONS]:false");
return(false);
}
byte[] peerGroup = ipEndpoint.MapToIpv6().Address.GetGroup();
foreach (INetworkPeer connectedPeer in networkPeers)
{
if (ipEndpoint == connectedPeer.PeerEndPoint)
{
continue;
}
byte[] group = connectedPeer.PeerEndPoint.MapToIpv6().Address.GetGroup();
if (peerGroup.SequenceEqual(group))
{
this.logger.LogTrace("(-)[SAME_GROUP]:true");
return(true);
}
}
return(false);
}
public void UpdateWithDifferentExternalAddress_IsNotFinal_ExternalAddressIsChanged_AndPeerScoreIsResetTo_1()
{
var oldIpEndpoint = new IPEndPoint(IPAddress.Parse("0.0.0.0"), 0);
var newIpEndpoint1 = new IPEndPoint(IPAddress.Parse("0.0.0.1"), 1);
var newIpEndpoint2 = new IPEndPoint(IPAddress.Parse("0.0.0.2"), 2);
var newIpEndpoint3 = new IPEndPoint(IPAddress.Parse("0.0.0.3"), 3);
this.selfEndpointTracker.UpdateAndAssignMyExternalAddress(oldIpEndpoint, false);
// When count reaches zero external address updates and score reset to 1.
this.selfEndpointTracker.UpdateAndAssignMyExternalAddress(newIpEndpoint1, false);
this.selfEndpointTracker.UpdateAndAssignMyExternalAddress(newIpEndpoint2, false);
this.selfEndpointTracker.UpdateAndAssignMyExternalAddress(newIpEndpoint3, false);
Assert.True(this.selfEndpointTracker.MyExternalAddress.Address.Equals(newIpEndpoint3.MapToIpv6().Address));
Assert.Equal(1, this.selfEndpointTracker.MyExternalAddressPeerScore);
}
/// <summary>
/// Adds a node to the -addnode collection.
/// <para>
/// Usually called via RPC.
/// </para>
/// </summary>
/// <param name="ipEndpoint">The endpoint of the peer to add.</param>
public void AddNodeAddress(IPEndPoint ipEndpoint)
{
Guard.NotNull(ipEndpoint, nameof(ipEndpoint));
this.logger.LogTrace("({0}:'{1}')", nameof(ipEndpoint), ipEndpoint);
this.peerAddressManager.AddPeer(new NetworkAddress(ipEndpoint.MapToIpv6()), IPAddress.Loopback);
if (!this.NodeSettings.ConnectionManager.AddNode.Any(p => p.Match(ipEndpoint)))
{
this.NodeSettings.ConnectionManager.AddNode.Add(ipEndpoint);
this.PeerConnectors.FirstOrDefault(pc => pc is PeerConnectorAddNode).MaximumNodeConnections++;
}
else
{
this.logger.LogTrace("The endpoint already exists in the add node collection.");
}
this.logger.LogTrace("(-)");
}
private PeerAddress AddPeerWithoutCleanup(IPEndPoint endPoint, IPAddress source)
{
if (!endPoint.Address.IsRoutable(true))
{
this.logger.LogTrace("(-)[PEER_NOT_ADDED_ISROUTABLE]:{0}", endPoint);
return(null);
}
IPEndPoint ipv6EndPoint = endPoint.MapToIpv6();
PeerAddress peerToAdd = PeerAddress.Create(ipv6EndPoint, source.MapToIPv6());
var added = this.peerInfoByPeerAddress.TryAdd(ipv6EndPoint, peerToAdd);
if (added)
{
this.logger.LogTrace("(-)[PEER_ADDED]:{0}", endPoint);
return(peerToAdd);
}
this.logger.LogTrace("(-)[PEER_NOT_ADDED_ALREADY_EXISTS]:{0}", endPoint);
return(null);
}
/// <inheritdoc/>
public void RemovePeer(IPEndPoint endPoint)
{
this.peerInfoByPeerAddress.TryRemove(endPoint.MapToIpv6(), out PeerAddress addr);
}
/// <summary>Match the end point with another by IP and port.</summary>
public static bool Match(this IPEndPoint endPoint, IPEndPoint matchWith)
{
return(endPoint.Address.ToString() == matchWith.MapToIpv6().Address.ToString() && endPoint.Port == matchWith.MapToIpv6().Port);
}
/// <summary>Match the IP address only (the port is ignored).</summary>
public static bool MatchIpOnly(this IPEndPoint endPoint, IPEndPoint matchWith)
{
return(endPoint.MapToIpv6().Address.ToString() == matchWith.MapToIpv6().Address.ToString());
}