Ipop.StaticDns.AddressLookUp C# (CSharp) Method

    public override String AddressLookUp(String name)
    {
      String res = null;
      // C 123 123 123 . domain.length
      int length = 1 + 9 + 1 + DomainName.Length;

      if(name.Length != length ||
          (name[0] != 'c' && name[0] != 'C') ||
          !name.EndsWith(DomainName, StringComparison.OrdinalIgnoreCase))
      {
        return null;
      }

      res = String.Empty;
      for(int i = 0; i < 3; i++) {
        res += Int32.Parse(name.Substring((3*i)+1, 3)) + ".";
      }
      return _base_address[0] + "." + res.Substring(0, res.Length - 1);
    }

        public void Test()
        {
            StaticDns dns = new StaticDns(
                MemBlock.Reference(Utils.StringToBytes("10.250.0.0", '.')),
                MemBlock.Reference(Utils.StringToBytes("255.255.0.0", '.')),
                string.Empty, false);

            Assert.AreEqual(dns.NameLookUp("10.250.1.1"), "C250001001.ipop", "NameLookUp Dns set in range.");

            try {
                Assert.AreEqual(dns.NameLookUp("10.251.1.1"), null, "NameLookUp Dns set out of range.");
            } catch { }

            Assert.AreEqual(dns.AddressLookUp("C250001001.ipop"), "10.250.1.1", "AddressLookUp Dns set.");

            try {
                Assert.AreEqual(dns.AddressLookUp("C250001001.blaha"), null, "AddressLookUp Dns set bad dns name: blaha.");
            } catch { }

            try {
                Assert.AreEqual(dns.AddressLookUp("C250001001.blah"), null, "AddressLookUp Dns set bad dns name: blah.");
            } catch { }

            dns = new StaticDns(
                MemBlock.Reference(Utils.StringToBytes("10.251.0.0", '.')),
                MemBlock.Reference(Utils.StringToBytes("255.255.0.0", '.')),
                string.Empty, false);

            try {
                Assert.AreEqual(dns.NameLookUp("10.250.1.1"), null, "NameLookUp Dns changed out of range.");
            } catch { }

            Assert.AreEqual(dns.NameLookUp("10.251.1.1"), "C251001001.ipop", "NameLookUp Dns changed in range.");
        }