public ConditionalForwardingDnsServer(IPEndPoint bindEndPoint, int udpListenerCount, int tcpListenerCount) :
base(bindEndPoint, udpListenerCount, tcpListenerCount)
{
UpStreamDns = DnsClient.Default;
PureDns = DnsClient.Default;
UpStreamEcs = null;
PureEcs = null;
LoadDomains(specialDomains);
LoadDomains(ptrDomains);
QueryReceived += OnQueryReceived;
}
internal override void ParseRecordData(ReadOnlySpan <byte> resultData, int startPosition, int length)
{
int endPosition = startPosition + length;
Options = new List <EDnsOptionBase>();
while (startPosition < endPosition)
{
EDnsOptionType type = (EDnsOptionType)DnsMessageBase.ParseUShort(resultData, ref startPosition);
ushort dataLength = DnsMessageBase.ParseUShort(resultData, ref startPosition);
EDnsOptionBase option;
switch (type)
{
case EDnsOptionType.LongLivedQuery:
option = new LongLivedQueryOption();
break;
case EDnsOptionType.UpdateLease:
option = new UpdateLeaseOption();
break;
case EDnsOptionType.NsId:
option = new NsIdOption();
break;
case EDnsOptionType.Owner:
option = new OwnerOption();
break;
case EDnsOptionType.DnssecAlgorithmUnderstood:
option = new DnssecAlgorithmUnderstoodOption();
break;
case EDnsOptionType.DsHashUnderstood:
option = new DsHashUnderstoodOption();
break;
case EDnsOptionType.Nsec3HashUnderstood:
option = new Nsec3HashUnderstoodOption();
break;
case EDnsOptionType.ClientSubnet:
option = new ClientSubnetOption();
break;
case EDnsOptionType.Expire:
option = new ExpireOption();
break;
case EDnsOptionType.Cookie:
option = new CookieOption();
break;
default:
option = new UnknownOption(type);
break;
}
option.ParseData(resultData, startPosition, dataLength);
Options.Add(option);
startPosition += dataLength;
}
}
