/// <summary>
/// Refreshes the managed whitelist.
/// </summary>
public void RefreshWhitelist()
{
this.logger.LogTrace("()");
DateTimeOffset activePeerLimit = this.dateTimeProvider.GetTimeOffset().AddSeconds(-this.dnsPeerBlacklistThresholdInSeconds);
var whitelist = this.peerAddressManager.Peers.Where(p => p.Value.LastConnectionHandshake > activePeerLimit).Select(p => p.Value);
if (!this.fullNodeMode)
{
// Exclude the current external ip address from DNS as its not a full node.
whitelist = whitelist.Where(p => !p.NetworkAddress.Endpoint.Match(this.externalEndpoint));
}
IMasterFile masterFile = new DnsSeedMasterFile();
foreach (PeerAddress whitelistEntry in whitelist)
{
Domain domain = new Domain(this.dnsHostName);
IPAddressResourceRecord resourceRecord = new IPAddressResourceRecord(domain, whitelistEntry.NetworkAddress.Endpoint.Address);
masterFile.Add(resourceRecord);
}
this.dnsServer.SwapMasterfile(masterFile);
this.logger.LogTrace("(-)");
}
/// <summary>
/// Refreshes the managed whitelist.
/// </summary>
public void RefreshWhitelist()
{
this.logger.LogTrace("()");
this.dnsPeerBlacklistThresholdInSeconds = this.dnsSettings.DnsPeerBlacklistThresholdInSeconds;
this.dnsHostName = this.dnsSettings.DnsHostName;
this.fullNodeMode = this.dnsSettings.DnsFullNode;
DateTimeOffset activePeerLimit = this.dateTimeProvider.GetTimeOffset().AddSeconds(-this.dnsPeerBlacklistThresholdInSeconds);
IEnumerable <PeerAddress> whitelist = this.peerAddressManager.Peers.Where(p => p.LastSeen > activePeerLimit);
if (!this.fullNodeMode)
{
// Exclude the current external ip address from DNS as its not a full node.
whitelist = whitelist.Where(p => !p.Endpoint.Match(this.externalEndpoint));
}
IMasterFile masterFile = new DnsSeedMasterFile();
foreach (PeerAddress whitelistEntry in whitelist)
{
if (this.peerBanning.IsBanned(whitelistEntry.Endpoint))
{
this.logger.LogDebug("{0}:{1} is banned, therefore removing from masterfile.", whitelistEntry.Endpoint.Address, whitelistEntry.Endpoint.Port);
continue;
}
var domain = new Domain(this.dnsHostName);
// Is this an IPv4 embedded address? If it is, make sure an 'A' record is added to the DNS master file, rather than an 'AAAA' record.
if (whitelistEntry.Endpoint.Address.IsIPv4MappedToIPv6)
{
IPAddress ipv4Address = whitelistEntry.Endpoint.Address.MapToIPv4();
var resourceRecord = new IPAddressResourceRecord(domain, ipv4Address);
masterFile.Add(resourceRecord);
}
else
{
var resourceRecord = new IPAddressResourceRecord(domain, whitelistEntry.Endpoint.Address);
masterFile.Add(resourceRecord);
}
}
this.dnsServer.SwapMasterfile(masterFile);
this.logger.LogTrace("(-)");
}
