public DnsQuestion(NetBinaryReader nbr)
{
List<string> labels = new List<string>();
byte nameLength;
while ((nameLength = nbr.ReadByte()) != 0)
{
string label = string.Empty;
for (int i = 0; i < nameLength; i++)
{
label += (char)nbr.ReadByte();
}
labels.Add(label);
}
QueriedDomainName = string.Join(".", labels);
Type = (QType)nbr.ReadUInt16();
ushort rawClass = nbr.ReadUInt16();
if (rawClass > 65279) rawClass = 0;
else if (rawClass > 4 && rawClass < 252) rawClass = 2;
else if (rawClass > 255 && rawClass < 65280) rawClass = 2;
Class = (DnsClass)rawClass;
}
Duplicates; // if any DNS lookup requests arrive with the same query they will be stored with the queued query.
public LookupRequest(string hostname, QType queryType, int timeout, List <IPEndPoint> dnsServers,
ManualResetEvent completeEvent)
{
Hostname = hostname;
QueryType = queryType;
Timeout = timeout;
DNSServers = dnsServers;
CompleteEvent = completeEvent;
}
protected Resource(string name, QType type, QClass qClass, uint ttl, ushort length, string data)
{
Name = name;
Type = type;
Class = qClass;
Ttl = ttl;
Length = length;
Data = data;
}
public mDNSQuestion(Byte[] data, int offset)
{
int idx = offset;
name = mDNSPacket.ReadName(data, ref idx);
QType = (QType)mDNSPacket.ReadUInt16(data, idx);
QClass = (QClass)mDNSPacket.ReadUInt16(data, (idx + 2));
ByteLen = ((idx + 4) - offset);
}
public static Dictionary <string, Variable> GetGlobals(string code)
{
Dictionary <string, Variable> vars = new Dictionary <string, Variable>();
Variable variable = new Variable();
List <string> lines = code.Split('\n').ToList();
//Console.WriteLine("[DEBUG] Pass 2: getting globals");
for (int i = 0; i < lines.Count; i++)
{
// Ignore lines that start with a //
string line = lines[i].TrimStart(' ').TrimEnd(' ');
if (line.StartsWith("//"))
{
continue;
}
if (line.StartsWith("global_var"))
{
// get the name
string[] split = line.Split('|');
if (split.Length > 4)
{
throw new ParseFailException(i, "Too many arguments to global_var!");
}
if (split.Length < 3)
{
throw new ParseFailException(i, "Invalid usage of global_var (usage: \"global_var|<type, int/string/bool/ri/rs/rb>|<your name>[|<default_value>]\")");
}
string name = split[2];
if (!IsValid.Identifier(name))
{
throw new ParseFailException(i, "Invalid function name");
}
if (vars.TryGetValue(name, out _))
{
throw new ParseFailException(i, "The " + name + " variable is already defined!");
}
QType qType = Misc.GetTypeFromString(i, split[1]);
variable.type = qType;
if (split.Length > 3)
{
variable.obj = Misc.GetObjectFromString(i, split[3], qType, vars);
}
else
{
variable.obj = Misc.GetDefaultObjectFromType(i, qType);
}
//Console.WriteLine($"[DEBUG] Found global {name} with value {variable.obj}");
vars.Add(name, variable);
variable = new Variable();
}
}
return(vars);
}
/// <summary>
/// Order Initiate Message – q format b
/// </summary>
/// <param name="ts"></param>
/// <param name="pri"></param>
/// <param name="code"></param>
/// <param name="ikey"></param>
/// <param name="par"></param>
public Message_q(int ts, int pri, int code, int ikey, List <int> par)
: base("q")
{
m_QType = QType.B;
m_TS = ts;
m_Pri = pri;
m_Code = code;
m_IKEY = ikey;
m_Par = par;
}
public ObjectStats(string name, int id, QType qType, Direction direction, int weight, Transform prefab)
{
Name = name;
ID = id;
this.QType = qType;
this.Direction = direction;
Weight = weight;
Prefab = prefab;
}
protected DnsRecordClient(
IDnsResolver dnsResolver,
ILogger log,
QType recordType,
string recordName)
{
_dnsResolver = dnsResolver;
_log = log;
_recordType = recordType;
_recordName = recordName;
}
public Question(string qName, QType qType, QClass qClass = QClass.IN)
{
if (!IsValidDomainName(qName))
{
throw new FormatException($"The domain name {qName} entered for QName is invalid!");
}
QName = qName;
QType = qType;
QClass = qClass;
}
private QFunction ReadFunction(QType qtype)
{
switch (qtype)
{
case QType.Lambda:
{
_reader.ReadSymbol(_encoding); // ignore context
var expression = (char[])ReadObject();
return(new QLambda(new string(expression)));
}
case QType.Projection:
{
var length = _reader.ReadInt32();
var parameters = new object[length];
for (var i = 0; i < length; i++)
{
parameters[i] = ReadObject();
}
return(new QProjection(parameters));
}
case QType.UnaryPrimitiveFunc:
{
var code = _reader.ReadByte();
return(code == 0 ? null : QFunction.Create((byte)qtype));
}
case QType.BinaryPrimitiveFunc:
case QType.TernaryOperatorFunc:
{
var code = _reader.ReadByte(); // ignore
return(QFunction.Create((byte)qtype));
}
case QType.CompositionFunc:
{
var length = _reader.ReadInt32();
var parameters = new object[length];
for (var i = 0; i < length; i++)
{
parameters[i] = ReadObject();
}
return(QFunction.Create((byte)qtype));
}
default:
{
ReadObject(); // ignore
return(QFunction.Create((byte)qtype));
}
}
}
public DnsAnswer(NetBinaryReader nbr)
{
Name = nbr.ReadLblOrPntString();
Type = (QType)nbr.ReadUInt16();
ushort rawClass = nbr.ReadUInt16();
if (rawClass > 65279) rawClass = 0;
else if (rawClass > 4 && rawClass < 252) rawClass = 2;
else if (rawClass > 255 && rawClass < 65280) rawClass = 2;
Class = (DnsClass)rawClass;
TTL = nbr.ReadUInt32();
ByteCount = nbr.ReadUInt16();
HandleRData(nbr);
}
public IList <string> CertRecords(string name)
{
IList <string> records = new List <string>();
const QType qType = QType.CERT;
const QClass qClass = QClass.IN;
Response response = _resolver.Query(name, qType, qClass);
foreach (RecordCERT record in response.RecordsCERT)
{
records.Add(record.ToString());
}
return(records);
}
/// <summary>
/// Do an QClass=IN Query on specified DNS servers
/// </summary>
/// <param name="name">Name to query</param>
/// <param name="qtype">Question type</param>
/// <returns>Response of the query</returns>
public Response Query(string name, QType qtype)
{
Question question = new Question(name, qtype, QClass.IN);
Response response = SearchInCache(question);
if (response != null)
{
return(response);
}
Request request = new Request();
request.AddQuestion(question);
return(GetResponse(request));
}
/// <summary>
/// Do Query on specified DNS servers
/// </summary>
/// <param name="name">Name to query</param>
/// <param name="qtype">Question type</param>
/// <param name="qclass">Class type</param>
/// <returns>Response of the query</returns>
public Response Query(string name, QType qtype, QClass qclass)
{
var question = new Question(name, qtype, qclass);
var response = SearchInCache(question);
if (response != null)
{
return(response);
}
var request = new Request();
request.AddQuestion(question);
return(GetResponse(request));
}
/// <summary>
/// Do Query on specified DNS servers
/// </summary>
/// <param name="name">Name to query</param>
/// <param name="qtype">Question type</param>
/// <param name="timeout">Timeout for lookup in seconds.</param>
/// <param name="qclass">Class type</param>
/// <returns>Response of the query</returns>
public DNSResponse Query(string name, QType qtype, QClass qclass, int timeout)
{
Question question = new Question(name, qtype, qclass);
DNSResponse response = SearchInCache(question);
if (response != null)
{
return(response);
}
DNSRequest request = new DNSRequest();
request.AddQuestion(question);
return(GetResponse(request, m_DnsServers, timeout));
}
/// <summary>
/// Returns default mapping for particular q type.
/// </summary>
/// <param name="type">Requested q type</param>
/// <returns>Type of the object being a result of q message deserialization</returns>
public static Type GetType(QType type)
{
if (FromQ.ContainsKey(type))
{
return(FromQ[type]);
}
switch (type)
{
case QType.NullItem:
return(null);
default:
throw new QReaderException("Cannot deserialize object of type: " + type);
}
}
public void Show(QType type = QType.Practice)
{
currentQType = type;
myPanel.Show();
qTitleText.text = "";
hintCloud.DOFade(1, 1).SetDelay(1).OnComplete(() =>
{
hintCloud.DOFade(0, 2).SetDelay(3);
}
);
Restart();
}
public DNSResponse Query(string name, QType qtype, int timeout, List <IPEndPoint> dnsServers)
{
Question question = new Question(name, qtype, QClass.IN);
DNSResponse response = SearchInCache(question);
if (response != null)
{
return(response);
}
DNSRequest request = new DNSRequest();
request.AddQuestion(question);
return(GetResponse(request, dnsServers, timeout));
}
private Response CreateRecord(string domainName, string[] records, bool hasError = false)
{
QType dnsEntryType = QType.MX;
Class dnsClass = Class.IN;
UInt32 ttl = 3600;
byte nameTerminator = 0;
byte[] domainNameBytes = Encoding.UTF8.GetBytes(domainName);
byte[] dnsEntryTypeBytes = BitConverter.GetBytes((UInt16)dnsEntryType).Reverse().ToArray();
byte[] dnsClassBytes = BitConverter.GetBytes((UInt16)dnsClass).Reverse().ToArray();
byte[] ttlBytes = BitConverter.GetBytes(ttl).Reverse().ToArray();
byte[] lengthBytes = BitConverter.GetBytes((UInt16)0).Reverse().ToArray();
Response response = new Response();
if (hasError)
{
response.header.RCODE = RCode.ServFail;
}
for (int i = 0; i < records.Length; i++)
{
byte[] preferenceBytes = BitConverter.GetBytes((UInt16)i).Reverse().ToArray();
byte[] recordBytes = Encoding.UTF8.GetBytes(records[i]);
using (MemoryStream memoryStream = new MemoryStream())
{
memoryStream.WriteByte((byte)domainNameBytes.Length);
memoryStream.Write(domainNameBytes, 0, domainNameBytes.Length);
memoryStream.WriteByte(nameTerminator);
memoryStream.Write(dnsEntryTypeBytes, 0, dnsEntryTypeBytes.Length);
memoryStream.Write(dnsClassBytes, 0, dnsClassBytes.Length);
memoryStream.Write(ttlBytes, 0, ttlBytes.Length);
memoryStream.Write(lengthBytes, 0, lengthBytes.Length);
memoryStream.Write(preferenceBytes, 0, preferenceBytes.Length);
memoryStream.WriteByte((byte)recordBytes.Length);
memoryStream.Write(recordBytes, 0, recordBytes.Length);
memoryStream.WriteByte(nameTerminator);
response.Answers.Add(new AnswerRR(new RecordReader(memoryStream.ToArray())));
}
}
return(response);
}
/// <summary>
/// 发送测试DNS请求
/// </summary>
private async void SendDNSRequestAsync()
{
DNSRequest request = DNSRequest.Instance;
IPAddress server;
try//检测IP是否合法
{
server = IPAddress.Parse(model.SiteAddress);
}
catch
{
await new MessageDialog("SiteAddress is wrong").ShowAsync();
return;
}
QType type = QType.A; //默认值为A
switch (model.RecordType) //获取QType
{
case 0:
type = QType.A;
break;
case 1:
type = QType.CNAME;
break;
case 2:
type = QType.NS;
break;
case 3:
type = QType.MX;
break;
default:
break;
}
request.DomainName = model.Lookup;
request.RecordType = type;
request.DnsServer = server;
await request.MakeRequest();
await new MessageDialog(request.RequestInfos).ShowAsync();//显示返回信息
}
private Response CreateRecord(string domainName, string[][] records, RCode responseCode = RCode.NoError)
{
Response response = new Response {
header = { RCODE = responseCode }
};
foreach (var record in records)
{
QType dnsEntryType = QType.TXT;
Class dnsClass = Class.IN;
byte nameTerminator = 0;
byte[] domainNameBytes = Encoding.UTF8.GetBytes(domainName);
byte[] dnsEntryTypeBytes = BitConverter.GetBytes((UInt16)dnsEntryType).Reverse().ToArray();
byte[] dnsClassBytes = BitConverter.GetBytes((UInt16)dnsClass).Reverse().ToArray();
byte[] ttlBytes = BitConverter.GetBytes(3600).Reverse().ToArray();
byte[][] recordsBytes = record.Select(_ => Encoding.UTF8.GetBytes(_)).ToArray();
byte[] lengthBytes =
BitConverter.GetBytes((UInt16)recordsBytes.Sum(_ => _.Length)).Reverse().ToArray();
using (MemoryStream memoryStream = new MemoryStream())
{
memoryStream.WriteByte((byte)domainNameBytes.Length);
memoryStream.Write(domainNameBytes, 0, domainNameBytes.Length);
memoryStream.WriteByte(nameTerminator);
memoryStream.Write(dnsEntryTypeBytes, 0, dnsEntryTypeBytes.Length);
memoryStream.Write(dnsClassBytes, 0, dnsClassBytes.Length);
memoryStream.Write(ttlBytes, 0, ttlBytes.Length);
memoryStream.Write(lengthBytes, 0, lengthBytes.Length);
foreach (var bytes in recordsBytes)
{
memoryStream.WriteByte((byte)bytes.Length);
memoryStream.Write(bytes, 0, bytes.Length);
}
response.Answers.Add(new AnswerRR(new RecordReader(memoryStream.ToArray())));
}
}
return(response);
}
private static List <string> GetColumns(QType qType, bool checkIdentity = true)
{
var columns = new List <string>();
var properties = typeof(TSource).GetProperties();
foreach (var v in properties)
{
if (IsValidPropertyType(v.PropertyType))
{
var attribute = v.GetCustomAttributes(false);
if (qType == QType.Select)
{
var hasAttrubute = attribute.FirstOrDefault(a => a.GetType() == typeof(NotMappedAttribute));
if (hasAttrubute == null)
{
columns.Add(v.Name);
}
}
if (qType == QType.Insert || qType == QType.Update || qType == QType.Delete)
{
object hasAttrubute;
if (checkIdentity)
{
hasAttrubute =
attribute.FirstOrDefault(
a => a is KeyAttribute || a.GetType() == typeof(NotMappedAttribute));
}
else
{
hasAttrubute = attribute.FirstOrDefault(a => a.GetType() == typeof(NotMappedAttribute));
}
if (hasAttrubute == null)
{
columns.Add(v.Name);
}
}
}
}
return(columns);
}
public Response Query(string hostName, QType type, QClass @class)
{
if (String.IsNullOrWhiteSpace(hostName))
{
throw new ArgumentException("Invalid host name", "hostName");
}
var question = new Question(hostName, type, @class);
var response = FindResponse(question);
if (response != null)
{
return(response);
}
var request = new Request();
request.AddQuestion(question);
response = GetResponse(request);
return(response);
}
public static object GetDefaultObjectFromType(int line, QType type)
{
switch (type)
{
case QType.Bool:
{
return(false);
}
case QType.String:
{
return("");
}
case QType.Int:
{
return(0);
}
}
return(null);
}
/// <summary>
/// Performs a Trace on query
/// </summary>
/// <param name="name"></param>
/// <param name="qtype"></param>
/// <param name="qclass"></param>
public void Trace(string name, QType qtype, QClass qclass)
{
Message("; <<>> DigTrace.Net {0} <<>> @{1} {2} {3}", resolver.Version, resolver.DnsServer, qtype, name);
Stopwatch sw = new Stopwatch();
sw.Start();
Message(";; Loading Root nameservers");
var rootaddresses = resolver.LoadRootFile();
foreach (var ra in rootaddresses)
{
//Message(";; Asking {0} ({1}) for nameserver for {2} ", ra.Key, ra.Value, name);
var nsaddress = TraceNameservers(name, ra, qtype, qclass, true);
if (nsaddress != null)
{
Message(";; Using {0} as nameserver for {1}", nsaddress, name);
resolver.DnsServer = nsaddress.ToString();
break;
}
}
Response response = resolver.Query(name, qtype, qclass);
sw.Stop();
if (response.Error != "")
{
Message(";; " + response.Error);
return;
}
PrintAnswer(response);
Message(";; Query time: {0} msec", sw.ElapsedMilliseconds);
Message(";; SERVER: {0}#{1}({2})", response.Server.Address, response.Server.Port, response.Server.Address);
Message(";; WHEN: " + response.TimeStamp.ToString("ddd MMM dd HH:mm:ss yyyy", CultureInfo.InvariantCulture));
Message(";; MSG SIZE rcvd: " + response.MessageSize);
}
int Dequeue(QType q)
{
nekara.ContextSwitch();
int x = q.Element[q.Head];
nekara.ContextSwitch();
q.Amount--;
nekara.ContextSwitch();
if (q.Head == this.Size)
{
nekara.ContextSwitch();
q.Head = 1;
}
else
{
nekara.ContextSwitch();
q.Head++;
}
return(x);
}
/// <summary>
/// Will parse resource data (DNS Answers) into IResource. The concrete type will be the answer type eg. MX = MxRecord Type
/// </summary>
/// <param name="data"></param>
/// <param name="receiveDnsPacket"></param>
/// <returns></returns>
public static IEnumerable <IResource> Parse(byte[] data, ReceiveDnsPacket receiveDnsPacket)
{
IResource[] resources = new IResource[receiveDnsPacket.Header.AnswersCounts];
int position = receiveDnsPacket.ToBytes().Length;
for (var i = 0; i < receiveDnsPacket.Header.AnswersCounts; i++)
{
var walkedHostname = GetRecordName(ref data, position);
string name = walkedHostname.hostname.ToString();
QType type = (QType)Enum.Parse(typeof(QType), ((int)data[walkedHostname.pos + 1]).ToString());
QClass qClass = (QClass)Enum.Parse(typeof(QClass), ((int)data[walkedHostname.pos + 3]).ToString());
uint ttl = BitConverter.ToUInt16(new[] { data[walkedHostname.pos + 5], data[walkedHostname.pos + 6], data[walkedHostname.pos + 7], data[walkedHostname.pos + 8] }, 0);
ushort length = data[walkedHostname.pos + 9];
var resourceData = ReadAnswer(ref data, walkedHostname.pos + 10, new Resource(name, type, qClass, ttl, length, null));
position = walkedHostname.pos + 10 + length;
resources[i] = resourceData;
}
return(resources);
}
int Enqueue(QType q, int x)
{
nekara.ContextSwitch();
q.Element[q.Tail] = x;
nekara.ContextSwitch();
q.Amount++;
nekara.ContextSwitch();
if (q.Tail == this.Size)
{
nekara.ContextSwitch();
q.Tail = 1;
}
else
{
nekara.ContextSwitch();
q.Tail++;
}
return(0);
}
public ActionResult RedirectQues(string QuesId)
{
int myQuesId = int.Parse(QuesId);
ApplicationDbContext db = new ApplicationDbContext();
Question Ques = (from q in db.Questions where q.id == myQuesId select q).First();
QType QuesT = (from q in db.Questions
join qt in db.QTypes on q.Type.id equals qt.id
where q.id == myQuesId
select qt).First();
switch (QuesT.id)
{
case 1:
return(RedirectToAction("ReturnPuzzle", "Teacher", Ques));
case 2:
return(ReturnQuiz(Ques));
case 3:
return(RedirectToAction("ReturnTranslate", "Teacher", Ques));
}
return(RedirectToAction("RedirectFailed", "Teacher"));
}
/// <summary>
/// Dig a query
/// </summary>
/// <param name="name"></param>
/// <param name="qtype"></param>
/// <param name="qclass"></param>
public void DigIt(string name, QType qtype, QClass qclass)
{
Message("; <<>> Dig.Net {0} <<>> @{1} {2} {3}", resolver.Version, resolver.DnsServer, qtype, name);
Stopwatch sw = new Stopwatch();
sw.Start();
Response response = resolver.Query(name, qtype, qclass);
sw.Stop();
if (response.Error != "")
{
Message(";; " + response.Error);
return;
}
PrintAnswer(response);
Message(";; Query time: {0} msec", sw.ElapsedMilliseconds);
Message(";; SERVER: {0}#{1}({2})", response.Server.Address, response.Server.Port, response.Server.Address);
Message(";; WHEN: " + response.TimeStamp.ToString("ddd MMM dd HH:mm:ss yyyy", CultureInfo.InvariantCulture));
Message(";; MSG SIZE rcvd: " + response.MessageSize);
}
/// <summary>
/// Do Query on specified DNS servers
/// </summary>
/// <param name="name">Name to query</param>
/// <param name="qtype">Question type</param>
/// <param name="qclass">Class type</param>
/// <returns>Response of the query</returns>
public Response Query(string name, QType qtype, QClass qclass)
{
var question = new Question(name, qtype, qclass);
var response = SearchInCache(question);
if (response != null)
return response;
var request = new Request();
request.AddQuestion(question);
return GetResponse(request);
}
/// <summary>
/// Do an QClass=IN Query on the previously cached results.
/// </summary>
/// <param name="name">Name to query</param>
/// <param name="qtype">Question type</param>
/// <returns>Response of the query</returns>
public DNSResponse QueryCache(string name, QType qtype, QClass qclass)
{
Question question = new Question(name, qtype, qclass);
return(SearchInCache(question));
}
private void WriteAtom(object obj, QType qtype)
{
writer.Write((sbyte)qtype);
switch (qtype)
{
case QType.Bool:
writer.Write((bool)obj);
return;
case QType.Byte:
writer.Write((byte)obj);
return;
case QType.Guid:
if (protocolVersion < 3)
{
throw new QWriterException("kdb+ protocol version violation: guid not supported pre kdb+ v3.0");
}
WriteGuid((Guid)obj);
return;
case QType.Short:
writer.Write((short)obj);
return;
case QType.Int:
writer.Write((int)obj);
return;
case QType.Long:
writer.Write((long)obj);
return;
case QType.Float:
writer.Write((float)obj);
return;
case QType.Double:
writer.Write((double)obj);
return;
case QType.Char:
writer.Write((char)obj);
return;
case QType.Symbol:
WriteSymbol(obj as string);
return;
case QType.Timestamp:
if (protocolVersion < 1)
{
throw new QWriterException("kdb+ protocol version violation: timestamp not supported pre kdb+ v2.6");
}
writer.Write(((QTimestamp)obj).Value);
return;
case QType.Month:
writer.Write(((QMonth)obj).Value);
return;
case QType.Date:
writer.Write(((QDate)obj).Value);
return;
case QType.Datetime:
writer.Write(((QDateTime)obj).Value);
return;
case QType.Timespan:
if (protocolVersion < 1)
{
throw new QWriterException("kdb+ protocol version violation: timespan not supported pre kdb+ v2.6");
}
writer.Write(((QTimespan)obj).Value);
return;
case QType.Minute:
writer.Write(((QMinute)obj).Value);
return;
case QType.Second:
writer.Write(((QSecond)obj).Value);
return;
case QType.Time:
writer.Write(((QTime)obj).Value);
return;
}
throw new QWriterException("Unable to serialize q atom of type: " + qtype);
}
public Question(RecordReader rr)
{
QName = rr.ReadDomainName();
QType = (QType)rr.ReadUInt16();
QClass = (QClass)rr.ReadUInt16();
}
public QToken(QType t)
{
TokenType = t;
}
/// <summary>
/// Returns object representing q null of particular type.
/// </summary>
/// <param name="type">Requested null type</param>
/// <returns>object representing q null</returns>
public static object GetQNull(QType type)
{
if (qNulls.ContainsKey(type))
{
return qNulls[type];
}
throw new QException("Cannot find null value of type: " + type);
}
/// <summary>
/// Starts a Dig operation
/// </summary>
/// <param name="name"></param>
/// <param name="qtype"></param>
/// <param name="qclass"></param>
public void BeginDigIt(string name, QType qtype, QClass qclass)
{
DigItDelegate d = new DigItDelegate(DigIt);
d.BeginInvoke(name, qtype, qclass, null, null);
}
private void WriteList(Array list, QType qtype)
{
writer.Write((sbyte)qtype);
writer.Write((byte)0); // attributes
writer.Write(list.Length);
switch (qtype)
{
case QType.BoolList:
{
var _list = list as bool[];
if (_list != null)
foreach (bool a in _list)
{
writer.Write(a);
}
return;
}
case QType.ByteList:
{
var _list = list as byte[];
if (_list != null)
foreach (byte a in _list)
{
writer.Write(a);
}
return;
}
case QType.GuidList:
{
if (protocolVersion < 3)
{
throw new QWriterException("kdb+ protocol version violation: guid not supported pre kdb+ v3.0");
}
var _list = list as Guid[];
if (_list != null)
foreach (Guid a in _list)
{
WriteGuid(a);
}
return;
}
case QType.ShortList:
{
var _list = list as short[];
if (_list != null)
foreach (short a in _list)
{
writer.Write(a);
}
return;
}
case QType.IntList:
{
var _list = list as int[];
if (_list != null)
foreach (int a in _list)
{
writer.Write(a);
}
return;
}
case QType.LongList:
{
var _list = list as long[];
if (_list != null)
foreach (long a in _list)
{
writer.Write(a);
}
return;
}
case QType.FloatList:
{
var _list = list as float[];
if (_list != null)
foreach (float a in _list)
{
writer.Write(a);
}
return;
}
case QType.DoubleList:
{
var _list = list as double[];
if (_list != null)
foreach (double a in _list)
{
writer.Write(a);
}
return;
}
case QType.SymbolList:
{
var _list = list as string[];
if (_list != null)
foreach (string a in _list)
{
WriteSymbol(a);
}
return;
}
case QType.TimestampList:
{
if (protocolVersion < 1)
{
throw new QWriterException("kdb+ protocol version violation: timestamp not supported pre kdb+ v2.6");
}
var _list = list as QTimestamp[];
if (_list != null)
foreach (QTimestamp a in _list)
{
writer.Write((a).Value);
}
return;
}
case QType.MonthList:
{
var _list = list as QMonth[];
if (_list != null)
foreach (QMonth a in _list)
{
writer.Write((a).Value);
}
return;
}
case QType.DateList:
{
var _list = list as QDate[];
if (_list != null)
foreach (QDate a in _list)
{
writer.Write((a).Value);
}
return;
}
case QType.DatetimeList:
{
var _list = list as QDateTime[];
if (_list != null)
foreach (QDateTime a in _list)
{
writer.Write((a).Value);
}
return;
}
case QType.TimespanList:
{
if (protocolVersion < 1)
{
throw new QWriterException("kdb+ protocol version violation: timespan not supported pre kdb+ v2.6");
}
var _list = list as QTimespan[];
if (_list != null)
foreach (QTimespan a in _list)
{
writer.Write((a).Value);
}
return;
}
case QType.MinuteList:
{
var _list = list as QMinute[];
if (_list != null)
foreach (QMinute a in _list)
{
writer.Write((a).Value);
}
return;
}
case QType.SecondList:
{
var _list = list as QSecond[];
if (_list != null)
foreach (QSecond a in _list)
{
writer.Write((a).Value);
}
return;
}
case QType.TimeList:
{
var _list = list as QTime[];
if (_list != null)
foreach (QTime a in _list)
{
writer.Write((a).Value);
}
return;
}
}
throw new QWriterException("Unable to serialize q vector of type: " + qtype);
}
public Response Query(string hostName, QType type, QClass @class)
{
if (String.IsNullOrWhiteSpace(hostName))
{
throw new ArgumentException("Invalid host name", "hostName");
}
var question = new Question(hostName, type, @class);
var response = FindResponse(question);
if (response != null)
{
return response;
}
var request = new Request();
request.AddQuestion(question);
response = GetResponse(request);
return response;
}
public void DigIt(string name, QType qtype)
{
DigIt(name, qtype, QClass.IN);
}
private QFunction ReadFunction(QType qtype)
{
switch (qtype)
{
case QType.Lambda:
{
_reader.ReadSymbol(_encoding); // ignore context
var expression = (char[]) ReadObject();
return new QLambda(new string(expression));
}
case QType.Projection:
{
var length = _reader.ReadInt32();
var parameters = new object[length];
for (var i = 0; i < length; i++)
{
parameters[i] = ReadObject();
}
return new QProjection(parameters);
}
case QType.UnaryPrimitiveFunc:
{
var code = _reader.ReadByte();
return code == 0 ? null : QFunction.Create((byte) qtype);
}
case QType.BinaryPrimitiveFunc:
case QType.TernaryOperatorFunc:
{
var code = _reader.ReadByte(); // ignore
return QFunction.Create((byte) qtype);
}
case QType.CompositionFunc:
{
var length = _reader.ReadInt32();
var parameters = new object[length];
for (var i = 0; i < length; i++)
{
parameters[i] = ReadObject();
}
return QFunction.Create((byte) qtype);
}
default:
{
ReadObject(); // ignore
return QFunction.Create((byte) qtype);
}
}
}
public QToken(QType t, object p)
{
TokenType = t; Param = p;
}
private object ReadList(QType qtype)
{
_reader.ReadByte(); // attributes
var length = _reader.ReadInt32();
switch (qtype)
{
case QType.BoolList:
{
var list = new bool[length];
for (var i = 0; i < length; i++)
{
list[i] = _reader.ReadBoolean();
}
return list;
}
case QType.ByteList:
{
var list = new byte[length];
for (var i = 0; i < length; i++)
{
list[i] = _reader.ReadByte();
}
return list;
}
case QType.GuidList:
{
var list = new Guid[length];
for (var i = 0; i < length; i++)
{
list[i] = _reader.ReadGuid();
}
return list;
}
case QType.ShortList:
{
var list = new short[length];
for (var i = 0; i < length; i++)
{
list[i] = _reader.ReadInt16();
}
return list;
}
case QType.IntList:
{
var list = new int[length];
for (var i = 0; i < length; i++)
{
list[i] = _reader.ReadInt32();
}
return list;
}
case QType.LongList:
{
var list = new long[length];
for (var i = 0; i < length; i++)
{
list[i] = _reader.ReadInt64();
}
return list;
}
case QType.FloatList:
{
var list = new float[length];
for (var i = 0; i < length; i++)
{
list[i] = _reader.ReadSingle();
}
return list;
}
case QType.DoubleList:
{
var list = new double[length];
for (var i = 0; i < length; i++)
{
list[i] = _reader.ReadDouble();
}
return list;
}
case QType.String:
{
return _encoding.GetChars(_reader.ReadBytes(length));
}
case QType.SymbolList:
{
var list = new string[length];
for (var i = 0; i < length; i++)
{
list[i] = ReadSymbol();
}
return list;
}
case QType.TimestampList:
{
var list = new QTimestamp[length];
for (var i = 0; i < length; i++)
{
list[i] = new QTimestamp(_reader.ReadInt64());
}
return list;
}
case QType.MonthList:
{
var list = new QMonth[length];
for (var i = 0; i < length; i++)
{
list[i] = new QMonth(_reader.ReadInt32());
}
return list;
}
case QType.DateList:
{
var list = new QDate[length];
for (var i = 0; i < length; i++)
{
list[i] = new QDate(_reader.ReadInt32());
}
return list;
}
case QType.DatetimeList:
{
var list = new QDateTime[length];
for (var i = 0; i < length; i++)
{
list[i] = new QDateTime(_reader.ReadDouble());
}
return list;
}
case QType.TimespanList:
{
var list = new QTimespan[length];
for (var i = 0; i < length; i++)
{
list[i] = new QTimespan(_reader.ReadInt64());
}
return list;
}
case QType.MinuteList:
{
var list = new QMinute[length];
for (var i = 0; i < length; i++)
{
list[i] = new QMinute(_reader.ReadInt32());
}
return list;
}
case QType.SecondList:
{
var list = new QSecond[length];
for (var i = 0; i < length; i++)
{
list[i] = new QSecond(_reader.ReadInt32());
}
return list;
}
case QType.TimeList:
{
var list = new QTime[length];
for (var i = 0; i < length; i++)
{
list[i] = new QTime(_reader.ReadInt32());
}
return list;
}
}
throw new QReaderException("Unable to deserialize q vector of type: " + qtype);
}
//public void Decrement(int q)
//{
// if (q >= 0 && q < QSize)
// mQuad[q]--;
//}
public void merge(Node l, Node r)
{
r = r == null ? new Node() : r;
l = l == null ? new Node() : l;
for (int i = 0; i < QSize; ++i)
{
mQuad[i] = l.mQuad[i] + r.mQuad[i];
}
// Rest Qtype
qType = QType.None;
}
public QuerySet(string Name, QType Type, QClass Class)
{
this.Name = Name;
this.Type = Type;
this.Class = Class;
}
public void SetType(QType t)
{
if (t == QType.X)
{
switch (qType)
{
case QType.X: qType = QType.None; break;
case QType.Y: qType = QType.XY; break;
case QType.XY: qType = QType.Y; break;
case QType.None: qType = QType.X; break;
}
}
else if (t == QType.Y)
{
switch (qType)
{
case QType.X: qType = QType.XY; break;
case QType.Y: qType = QType.None; break;
case QType.XY: qType = QType.X; break;
case QType.None: qType = QType.Y; break;
}
}
else if (t == QType.XY)
{
switch (qType)
{
case QType.X: qType = QType.Y; break;
case QType.Y: qType = QType.X; break;
case QType.XY: qType = QType.None; break;
case QType.None: qType = QType.XY; break;
}
}
}
/// <summary>
/// Returns default mapping for particular q type.
/// </summary>
/// <param name="type">Requested q type</param>
/// <returns>Type of the object being a result of q message deserialization</returns>
public static Type GetType(QType type)
{
if (fromQ.ContainsKey(type))
{
return fromQ[type];
}
switch (type)
{
case QType.NullItem:
return null;
default:
throw new QReaderException("Cannot deserialize object of type: " + type);
}
}
public void Transform()
{
int tmp = 0;
switch (qType)
{
case QType.Y:
tmp = mQuad[0];
mQuad[0] = mQuad[1];
mQuad[1] = tmp;
tmp = mQuad[2];
mQuad[2] = mQuad[3];
mQuad[3] = tmp;
break;
case QType.X:
tmp = mQuad[0];
mQuad[0] = mQuad[3];
mQuad[3] = tmp;
tmp = mQuad[2];
mQuad[2] = mQuad[1];
mQuad[1] = tmp;
break;
case QType.XY:
tmp = mQuad[0];
mQuad[0] = mQuad[2];
mQuad[2] = tmp;
tmp = mQuad[1];
mQuad[1] = mQuad[3];
mQuad[3] = tmp;
break;
case QType.None:
break;
default:
break;
}
// Set Qtype to None after transform
qType = QType.None;
}
public Question(string QName,QType QType,QClass QClass)
{
this.QName = QName;
this.QType = QType;
this.QClass = QClass;
}
// Update Values for Points in Tree
public void Update(int uBegin, int uEnd, QType type)
{
Update(1, uBegin, uEnd, type);
}
/// <summary>
/// Do an QClass=IN Query on specified DNS servers
/// </summary>
/// <param name="name">Name to query</param>
/// <param name="qtype">Question type</param>
/// <returns>Response of the query</returns>
public Response Query(string name, QType qtype)
{
Question question = new Question(name, qtype, QClass.IN);
Response response = SearchInCache(question);
if (response != null)
return response;
Request request = new Request();
request.AddQuestion(question);
return GetResponse(request);
}
// Update this to do a range update
// Take in a range for udating the xflips and yflips
// Need to drill down to leafs and update them then merge
// Very similar to BuildTree
private Node Update(int idx, int uBegin, int uEnd, QType type)
{
Node seg = mSegTree[idx - 1];
if (idx >= mMaxNodes || !seg.IsValid())
return new Node();
// Update node if in range
if (seg.IsLeaf())
{
seg.SetType(type);
seg.Transform();
return seg;
}
// Retrive Child nodes and set type
int leftIdx = GetLeftChild(idx);
int rightIdx = GetRightChild(idx);
Node lSeg = mSegTree[leftIdx - 1] != null ? mSegTree[leftIdx - 1] : new Node();
Node rSeg = mSegTree[rightIdx - 1] != null ? mSegTree[rightIdx - 1] : new Node();
if (uBegin <= seg.Start && seg.End <= uEnd)
{
// Set Type
seg.SetType(type);
// Set QType for child segment nodes
lSeg.SetType(seg.GetQType());
rSeg.SetType(seg.GetQType());
// Transfrom Quads
seg.Transform();
return seg;
}
// Propogate the changes down the tree.
lSeg.SetType(seg.GetQType());
rSeg.SetType(seg.GetQType());
seg.SetType(seg.GetQType()); // Reset to NONE
// Query Child nodes
Node left = leftIdx < mMaxNodes && uBegin <= lSeg.End ?
Update(leftIdx, uBegin, uEnd, type) :
Update(leftIdx, lSeg.Start, lSeg.End, QType.None);
Node right = rightIdx < mMaxNodes && uEnd >= rSeg.Start ?
Update(rightIdx, uBegin, uEnd, type) :
Update(rightIdx, rSeg.Start, rSeg.End, QType.None);
seg.merge(left, right);
return seg;
}
public static DNSResponse Lookup(string hostname, QType queryType, int timeout, List <IPEndPoint> dnsServers, bool useCache, bool async)
{
if (hostname == null || hostname.Trim().Length == 0)
{
return(null);
}
DNSResponse ipAddressResult = MatchIPAddress(hostname);
if (ipAddressResult != null)
{
return(ipAddressResult);
}
else if (useCache)
{
DNSResponse cacheResult = m_resolver.QueryCache(hostname.Trim().ToLower(), queryType);
if (cacheResult != null)
{
return(cacheResult);
}
}
if (async)
{
//logger.LogDebug("DNS lookup cache miss for async lookup to " + queryType.ToString() + " " + hostname + ".");
QueueLookup(new LookupRequest(hostname.Trim().ToLower(), queryType, timeout, dnsServers, null));
return(null);
}
else
{
ManualResetEvent completeEvent = new ManualResetEvent(false);
QueueLookup(new LookupRequest(hostname.Trim().ToLower(), queryType, timeout, dnsServers, completeEvent));
if (completeEvent.WaitOne(timeout * 1000 * 2, false))
{
//logger.LogDebug("Complete event fired for DNS lookup on " + queryType.ToString() + " " + hostname + ".");
// Completed event was fired, the DNS entry will now be in cache.
DNSResponse result = m_resolver.QueryCache(hostname, queryType);
if (result != null)
{
return(result);
}
else
{
//logger.LogDebug("DNS lookup cache miss for " + queryType.ToString() + " " + hostname + ".");
// Timeout.
DNSResponse timeoutResponse = new DNSResponse();
timeoutResponse.Timedout = true;
return(timeoutResponse);
}
}
else
{
// If this block gets called it's because the DNS resolver class did not return within twice the timeout period it
// was asked to do so in. If this happens a lot further investigation into the DNS resolver class is warranted.
logger.LogError("DNSManager timed out waiting for the DNS resolver to complete the lookup for " + queryType.ToString() + " " + hostname + ".");
// Timeout.
DNSResponse timeoutResponse = new DNSResponse();
timeoutResponse.Timedout = true;
return(timeoutResponse);
}
}
}
private object ReadAtom(QType qtype)
{
switch (qtype)
{
case QType.Bool:
return _reader.ReadBoolean();
case QType.Byte:
return _reader.ReadByte();
case QType.Guid:
return _reader.ReadGuid();
case QType.Short:
return _reader.ReadInt16();
case QType.Int:
return _reader.ReadInt32();
case QType.Long:
return _reader.ReadInt64();
case QType.Float:
return _reader.ReadSingle();
case QType.Double:
return _reader.ReadDouble();
case QType.Char:
return _reader.ReadChar();
case QType.Timestamp:
return new QTimestamp(_reader.ReadInt64());
case QType.Month:
return new QMonth(_reader.ReadInt32());
case QType.Date:
return new QDate(_reader.ReadInt32());
case QType.Datetime:
return new QDateTime(_reader.ReadDouble());
case QType.Timespan:
return new QTimespan(_reader.ReadInt64());
case QType.Minute:
return new QMinute(_reader.ReadInt32());
case QType.Second:
return new QSecond(_reader.ReadInt32());
case QType.Time:
return new QTime(_reader.ReadInt32());
}
throw new QReaderException("Unable to deserialize q atom of type: " + qtype);
}
/// <summary>
/// Dig a query
/// </summary>
/// <param name="name"></param>
/// <param name="qtype"></param>
/// <param name="qclass"></param>
public void DigIt(string name, QType qtype, QClass qclass)
{
Message("; <<>> Dig.Net {0} <<>> @{1} {2} {3}", resolver.Version, resolver.DnsServer, qtype, name);
Stopwatch sw = new Stopwatch();
sw.Start();
Response response = resolver.Query(name, qtype, qclass);
sw.Stop();
if (response.Error != "")
{
Message(";; " + response.Error);
return;
}
PrintAnswer(response);
Message(";; Query time: {0} msec", sw.ElapsedMilliseconds);
Message(";; SERVER: {0}#{1}({2})", response.Server.Address, response.Server.Port, response.Server.Address);
Message(";; WHEN: " + response.TimeStamp.ToString("ddd MMM dd HH:mm:ss yyyy", CultureInfo.InvariantCulture));
Message(";; MSG SIZE rcvd: " + response.MessageSize);
}
public void DigIt(string name, QType qtype, QClass qclass)
{
Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US", false);
Thread.CurrentThread.CurrentUICulture = new CultureInfo("en-US", false);
Console.WriteLine("; <<>> Dig.Net {0} <<>> @{1} {2} {3}", resolver.Version, resolver.DnsServer, qtype, name);
Console.WriteLine(";; global options: printcmd");
Stopwatch sw = new Stopwatch();
sw.Start();
Response response = resolver.Query(name, qtype, qclass);
sw.Stop();
if(response.Error != "")
{
Console.WriteLine(";; " + response.Error);
return;
}
Console.WriteLine(";; Got answer:");
Console.WriteLine(";; ->>HEADER<<- opcode: {0}, status: {1}, id: {2}",
response.header.OPCODE,
response.header.RCODE,
response.header.ID);
Console.WriteLine(";; flags: {0}{1}{2}{3}; QUERY: {4}, ANSWER: {5}, AUTHORITY: {6}, ADDITIONAL: {7}",
response.header.QR ? " qr" : "",
response.header.AA ? " aa" : "",
response.header.RD ? " rd" : "",
response.header.RA ? " ra" : "",
response.header.QDCOUNT,
response.header.ANCOUNT,
response.header.NSCOUNT,
response.header.ARCOUNT);
Console.WriteLine("");
if (response.header.QDCOUNT > 0)
{
Console.WriteLine(";; QUESTION SECTION:");
foreach (Question question in response.Questions)
Console.WriteLine(";{0}" , question);
Console.WriteLine("");
}
if (response.header.ANCOUNT > 0)
{
Console.WriteLine(";; ANSWER SECTION:");
foreach (AnswerRR answerRR in response.Answers)
Console.WriteLine(answerRR);
Console.WriteLine("");
}
if (response.header.NSCOUNT > 0)
{
Console.WriteLine(";; AUTHORITY SECTION:");
foreach (AuthorityRR authorityRR in response.Authorities)
Console.WriteLine(authorityRR);
Console.WriteLine("");
}
if (response.header.ARCOUNT > 0)
{
Console.WriteLine(";; ADDITIONAL SECTION:");
foreach (AdditionalRR additionalRR in response.Additionals)
Console.WriteLine(additionalRR);
Console.WriteLine("");
}
Console.WriteLine(";; Query time: {0} msec", sw.ElapsedMilliseconds);
Console.WriteLine(";; SERVER: {0}#{1}({2})" ,response.Server.Address,response.Server.Port,response.Server.Address);
Console.WriteLine(";; WHEN: " + response.TimeStamp.ToString("ddd MMM dd HH:mm:ss yyyy",new System.Globalization.CultureInfo("en-US")));
Console.WriteLine(";; MSG SIZE rcvd: " + response.MessageSize);
}
/// <summary>
/// 返回一个bool表达式
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="Property"></param>
/// <param name="Data"></param>
/// <param name="QueryType"></param>
/// <returns></returns>
public static Expression <Func <T, bool> > GetExpression <T>(string Property, object Data, QType QueryType)
{
return(Expsion.GetExpression <T>(Property, Data, QueryType));
}
/// <summary>
/// Performs a Trace on query
/// </summary>
/// <param name="name"></param>
/// <param name="qtype"></param>
/// <param name="qclass"></param>
public void Trace(string name, QType qtype, QClass qclass)
{
Message("; <<>> DigTrace.Net {0} <<>> @{1} {2} {3}", resolver.Version, resolver.DnsServer, qtype, name);
Stopwatch sw = new Stopwatch();
sw.Start();
Message(";; Loading Root nameservers");
var rootaddresses = resolver.LoadRootFile();
foreach(var ra in rootaddresses)
{
//Message(";; Asking {0} ({1}) for nameserver for {2} ", ra.Key, ra.Value, name);
var nsaddress = TraceNameservers(name, ra,qtype, qclass, true);
if (nsaddress != null)
{
Message(";; Using {0} as nameserver for {1}", nsaddress, name);
resolver.DnsServer = nsaddress.ToString();
break;
}
}
Response response = resolver.Query(name, qtype, qclass);
sw.Stop();
if (response.Error != "")
{
Message(";; " + response.Error);
return;
}
PrintAnswer(response);
Message(";; Query time: {0} msec", sw.ElapsedMilliseconds);
Message(";; SERVER: {0}#{1}({2})", response.Server.Address, response.Server.Port, response.Server.Address);
Message(";; WHEN: " + response.TimeStamp.ToString("ddd MMM dd HH:mm:ss yyyy", CultureInfo.InvariantCulture));
Message(";; MSG SIZE rcvd: " + response.MessageSize);
}
/// <summary>
/// Recursive tracing of nameservers
/// </summary>
/// <param name="name"></param>
/// <param name="parentNameserver"></param>
/// <param name="qtype"></param>
/// <param name="qclass"></param>
/// <param name="firstOnly"></param>
/// <returns></returns>
private IPAddress TraceNameservers(string name, KeyValuePair<string, IPAddress> parentNameserver, QType qtype, QClass qclass, bool firstOnly)
{
Message(";; Asking {0} ({1}) for nameserver of {2} ", parentNameserver.Key, parentNameserver.Value, name);
resolver.DnsServer = parentNameserver.Value.ToString();
//preserving cache flag
var saveuseCache = resolver.UseCache;
resolver.UseCache = false;
//performing a nameserver search
Response nsresponse = resolver.Query(name, QType.NS, QClass.IN);
//performing the requested search
Response qresponse = resolver.Query(name, qtype, qclass);
resolver.UseCache = saveuseCache;
//sorting answers
List<RecordNS> nameservers = new List<RecordNS>();
List<RecordA> nameserveraddresses = new List<RecordA>();
List<RecordAAAA> nameserveraddresV6 = new List<RecordAAAA>();
foreach (var ans in nsresponse.Answers)
SortAnswers(nameservers, nameserveraddresses, nameserveraddresV6, ans.RECORD);
foreach (var ans in nsresponse.Authorities)
SortAnswers(nameservers, nameserveraddresses, nameserveraddresV6, ans.RECORD);
foreach (var ans in nsresponse.Additionals)
SortAnswers(nameservers, nameserveraddresses, nameserveraddresV6, ans.RECORD);
foreach (var ans in qresponse.Answers)
SortAnswers(nameservers, nameserveraddresses, nameserveraddresV6, ans.RECORD);
foreach (var ans in qresponse.Authorities)
SortAnswers(nameservers, nameserveraddresses, nameserveraddresV6, ans.RECORD);
foreach (var ans in qresponse.Additionals)
SortAnswers(nameservers, nameserveraddresses, nameserveraddresV6, ans.RECORD);
//if one of the nameservers is the calling nameserver, we've reached the end, return the IP of this nameserver
//if there are answers (from the requested query) - we have the name server
//if there are no more child nameservers - we reached the end, return the nameserver we did find and attempt a query on it.
if ((nameservers.FirstOrDefault(i => i.NSDNAME == parentNameserver.Key) != null) || (qresponse.Answers.Count > 0) || (nameservers.Count == 0))
return parentNameserver.Value;
foreach (var ns in nameservers)
{
string nsname = ns.NSDNAME;
var nsaddress = nameserveraddresses.Where(nsa => nsa.RR.NAME == nsname).Select(nsa=>nsa.Address).FirstOrDefault();
if (nsaddress == null)
nsaddress = nameserveraddresV6.Where(nsa => nsa.RR.NAME == nsname).Select(nsa=>nsa.Address).FirstOrDefault();
if (nsaddress == null)
{
Message(";; nameserver {0} did not provide an address, attempting to resolve.",nsname);
//continue;
var hostentry = Dns.GetHostEntry(nsname);
if ((hostentry != null) && (hostentry.AddressList.Length > 0))
{
nsaddress = hostentry.AddressList[0];
Message(";; nameserver {0} extrnally resolved to {1}", nsname,nsaddress);
}
else
{
Message(";; nameserver {0} doesn't have an address and failed to resolve, skipping.", nsname);
continue;
}
}
var childns = TraceNameservers(name, new KeyValuePair<string, IPAddress>(nsname, nsaddress),qtype,qclass, firstOnly);
if (childns != null)
{
//reached the last NS.
return childns;
}
}
return null;
}
///<summary>
///</summary>
///<param name="qName"></param>
///<param name="qType"></param>
///<param name="qClass"></param>
public Question(string qName, QType qType, QClass qClass)
{
QName = qName;
QType = qType;
QClass = qClass;
}