public void Lookup(IDNSRequest request, ref DomainName cloneFromZone, ref int prefixLabels, ref bool forceAA)
{
var tz = request.QName;
var ct = 0;
while (true)
{
if (tz == DomainName.Root)
{
return;
}
if (ToZones.ContainsKey(tz))
{
cloneFromZone = FromZone;
prefixLabels = ct;
forceAA = false;
return;
}
ct += 1;
tz = tz.Parent();
}
}
public void LookupTXT(IDNSRequest req, ref string resultText, ref int resultTTL)
{
throw new NotImplementedException();
}
public void Lookup(IDNSRequest req, ref IPAddress resultIP, ref int resultTTL)
{
resultIP = null;
var HostName = req.QName.ToString().ToLower();
if (Cfg.Prefix.Length > 0 && !HostName.StartsWith(Cfg.Prefix)) return;
if (!HostName.EndsWith(Cfg.Suffix)) return;
var IPPart = HostName.Substring(Cfg.Prefix.Length);
IPPart = IPPart.Substring(0, IPPart.Length - Cfg.Suffix.Length);
if (CfgIPv6)
{
IPPart = IPPart.Replace("-", "");
if (!Cfg.FullIP) IPPart = HostIPMatchPrefix + IPPart;
if (IPPart.Length != 32) return;
IPPart = IPPart.Substring(0, 4) + ":" +
IPPart.Substring(4, 4) + ":" +
IPPart.Substring(8, 4) + ":" +
IPPart.Substring(12, 4) + ":" +
IPPart.Substring(16, 4) + ":" +
IPPart.Substring(20, 4) + ":" +
IPPart.Substring(24, 4) + ":" +
IPPart.Substring(28, 4);
if (!IPAddressV6.TryParse(IPPart, ref resultIP)) { resultIP = null; return; }
}
else
{
IPPart = IPPart.Replace("-", ".");
if (!Cfg.FullIP) IPPart = HostIPMatchPrefix + "." + IPPart;
if (!IPAddressV4.TryParse(IPPart, ref resultIP)) { resultIP = null; return; }
}
resultTTL = Cfg.TTL;
}
public void LookupReverse(IDNSRequest req, ref DomainName resultName, ref int resultTTL)
{
resultName = null;
var ipb = req.QNameIP.GetBytes();
var sn = Cfg.FullIP ? 0 : Cfg.Subnet;
string x;
if (CfgIPv6)
{
var sb = new System.Text.StringBuilder(32);
for (var i = 0; i < 16; i++) sb.Append(ByteToHex2(ipb[i]));
var z = sb.ToString();
if (!Cfg.FullIP) z = z.Substring(Cfg.Subnet / 4);
//insert hypens instead of colons
x = "";
int p;
while (z.Length > 0)
{
if (x.Length > 0) x = "-" + x;
if (z.Length <= 4) p = 0; else p = z.Length - 4;
x = z.Substring(p) + x;
z = z.Substring(0, p);
}
}
else
{ //IPv4
x = ipb[3].ToString();
if (sn <= 16) x = ipb[2].ToString() + "-" + x;
if (sn <= 8) x = ipb[1].ToString() + "-" + x;
if (sn == 0) x = ipb[0].ToString() + "-" + x;
}
resultName = DomainName.Parse(Cfg.Prefix + x + Cfg.Suffix);
resultTTL = Cfg.TTL;
}
