public DSRecord(DataBuffer buffer, int length)
{
_key = buffer.ReadShortInt();
_algorithm = buffer.ReadByte();
_digestType = buffer.ReadByte();
_digest = buffer.ReadBytes(length - 4);
}
public KeyRecord(DataBuffer buffer, int length)
{
_flags = buffer.ReadShortInt();
_protocol = buffer.ReadByte();
_algorithm = buffer.ReadByte();
_publicKey = buffer.ReadBytes(length - 4);
}
public WksRecord(DataBuffer buffer, int length)
{
_ipAddress = buffer.ReadIPAddress();
_protocol = buffer.ReadByte();
_services = new Byte[length - 5];
for (int i = 0; i < (length - 5); i++)
_services[i] = buffer.ReadByte();
}
public DnsEntry(DataBuffer buffer)
{
try
{
_domain = buffer.ReadDomainName();
byte b = buffer.ReadByte();
_recType = (RecordType)buffer.ReadShortInt();
_classType = buffer.ReadShortInt();
_ttl = buffer.ReadInt();
int length = buffer.ReadByte();
switch (_recType)
{
case RecordType.A: _data = new ARecord(buffer); break;
case RecordType.NS: _data = new NSRecord(buffer); break;
case RecordType.CNAME: _data = new CNameRecord(buffer); break;
case RecordType.SOA: _data = new SoaRecord(buffer); break;
case RecordType.MB: _data = new MBRecord(buffer); break;
case RecordType.MG: _data = new MGRecord(buffer); break;
case RecordType.MR: _data = new MRRecord(buffer); break;
case RecordType.NULL: _data = new NullRecord(buffer, length); break;
case RecordType.WKS: _data = new WksRecord(buffer, length); break;
case RecordType.PTR: _data = new PtrRecord(buffer); break;
case RecordType.HINFO: _data = new HInfoRecord(buffer, length); break;
case RecordType.MINFO: _data = new MInfoRecord(buffer); break;
case RecordType.MX: _data = new MXRecord(buffer); break;
case RecordType.TXT: _data = new TxtRecord(buffer, length); break;
case RecordType.RP: _data = new RPRecord(buffer); break;
case RecordType.AFSDB: _data = new AfsdbRecord(buffer); break;
case RecordType.X25: _data = new X25Record(buffer); break;
case RecordType.ISDN: _data = new IsdnRecord(buffer); break;
case RecordType.RT: _data = new RTRecord(buffer); break;
case RecordType.NSAP: _data = new NsapRecord(buffer, length); break;
case RecordType.SIG: _data = new SigRecord(buffer, length); break;
case RecordType.KEY: _data = new KeyRecord(buffer, length); break;
case RecordType.PX: _data = new PXRecord(buffer); break;
case RecordType.AAAA: _data = new AAAARecord(buffer); break;
case RecordType.LOC: _data = new LocRecord(buffer); break;
case RecordType.SRV: _data = new SrvRecord(buffer); break;
case RecordType.NAPTR: _data = new NaptrRecord(buffer); break;
case RecordType.KX: _data = new KXRecord(buffer); break;
case RecordType.A6: _data = new A6Record(buffer); break;
case RecordType.DNAME: _data = new DNameRecord(buffer); break;
case RecordType.DS: _data = new DSRecord(buffer, length); break;
case RecordType.TKEY: _data = new TKeyRecord(buffer); break;
case RecordType.TSIG: _data = new TSigRecord(buffer); break;
default: throw new DnsQueryException("Invalid DNS Record Type in DNS Response", null);
}
}
catch (Exception ex)
{
_data = new ExceptionRecord(ex.Message);
throw ex;
}
}
public SigRecord(DataBuffer buffer, int length)
{
int pos = buffer.Position;
_coveredType = buffer.ReadShortInt();
_algorithm = buffer.ReadByte();
_numLabels = buffer.ReadByte();
_expiration = buffer.ReadUInt();
_inception = buffer.ReadUInt();
_keyTag = buffer.ReadShortInt();
_signer = buffer.ReadDomainName();
buffer.Position = pos - length;
}
public A6Record(DataBuffer buffer)
{
_prefixLength = buffer.ReadByte();
if (_prefixLength == 0) //Only Address Present
{
_ipAddress = buffer.ReadIPv6Address();
}
else if (_prefixLength == 128) //Only Domain Name Present
{
_domain = buffer.ReadDomainName();
}
else //Address and Domain Name Present
{
_ipAddress = buffer.ReadIPv6Address();
_domain = buffer.ReadDomainName();
}
}
public DnsAnswer(byte[] response)
{
_questions = new List<Question>();
_answers = new List<Answer>();
_servers = new List<Server>();
_additional = new List<Record>();
_exceptions = new List<Exception>();
DataBuffer buffer = new DataBuffer(response, 2);
byte bits1 = buffer.ReadByte();
byte bits2 = buffer.ReadByte();
//Mask off return code
int returnCode = bits2 & 15;
if (returnCode > 6) returnCode = 6;
this._returnCode = (ReturnCode)returnCode;
//Get Additional Flags
_authoritative = TestBit(bits1, 2);
_recursive = TestBit(bits2, 8);
_truncated = TestBit(bits1, 1);
int nQuestions = buffer.ReadBEShortInt();
int nAnswers = buffer.ReadBEShortInt();
int nServers = buffer.ReadBEShortInt();
int nAdditional = buffer.ReadBEShortInt();
//read in questions
for (int i = 0; i < nQuestions; i++)
{
try
{
_questions.Add(new Question(buffer));
}
catch (Exception ex)
{
_exceptions.Add(ex);
}
}
//read in answers
for (int i = 0; i < nAnswers; i++)
{
try
{
_answers.Add(new Answer(buffer));
}
catch (Exception ex)
{
_exceptions.Add(ex);
}
}
//read in servers
for (int i = 0; i < nServers; i++)
{
try
{
_servers.Add(new Server(buffer));
}
catch (Exception ex)
{
_exceptions.Add(ex);
}
}
//read in additional records
for (int i = 0; i < nAdditional; i++)
{
try
{
_additional.Add(new Record(buffer));
}
catch (Exception ex)
{
_exceptions.Add(ex);
}
}
}
public DnsEntry(DataBuffer buffer)
{
try
{
_domain = buffer.ReadDomainName();
byte b = buffer.ReadByte();
_recType = (RecordType)buffer.ReadShortInt();
_classType = buffer.ReadShortInt();
_ttl = buffer.ReadInt();
int length = buffer.ReadByte();
switch (_recType)
{
case RecordType.A: _data = new ARecord(buffer); break;
case RecordType.NS: _data = new NSRecord(buffer); break;
case RecordType.CNAME: _data = new CNameRecord(buffer); break;
case RecordType.SOA: _data = new SoaRecord(buffer); break;
case RecordType.MB: _data = new MBRecord(buffer); break;
case RecordType.MG: _data = new MGRecord(buffer); break;
case RecordType.MR: _data = new MRRecord(buffer); break;
case RecordType.NULL: _data = new NullRecord(buffer, length); break;
case RecordType.WKS: _data = new WksRecord(buffer, length); break;
case RecordType.PTR: _data = new PtrRecord(buffer); break;
case RecordType.HINFO: _data = new HInfoRecord(buffer, length); break;
case RecordType.MINFO: _data = new MInfoRecord(buffer); break;
case RecordType.MX: _data = new MXRecord(buffer); break;
case RecordType.TXT: _data = new TxtRecord(buffer, length); break;
case RecordType.RP: _data = new RPRecord(buffer); break;
case RecordType.AFSDB: _data = new AfsdbRecord(buffer); break;
case RecordType.X25: _data = new X25Record(buffer); break;
case RecordType.ISDN: _data = new IsdnRecord(buffer); break;
case RecordType.RT: _data = new RTRecord(buffer); break;
case RecordType.NSAP: _data = new NsapRecord(buffer, length); break;
case RecordType.SIG: _data = new SigRecord(buffer, length); break;
case RecordType.KEY: _data = new KeyRecord(buffer, length); break;
case RecordType.PX: _data = new PXRecord(buffer); break;
case RecordType.AAAA: _data = new AAAARecord(buffer); break;
case RecordType.LOC: _data = new LocRecord(buffer); break;
case RecordType.SRV: _data = new SrvRecord(buffer); break;
case RecordType.NAPTR: _data = new NaptrRecord(buffer); break;
case RecordType.KX: _data = new KXRecord(buffer); break;
case RecordType.A6: _data = new A6Record(buffer); break;
case RecordType.DNAME: _data = new DNameRecord(buffer); break;
case RecordType.DS: _data = new DSRecord(buffer, length); break;
case RecordType.TKEY: _data = new TKeyRecord(buffer); break;
case RecordType.TSIG: _data = new TSigRecord(buffer); break;
default: throw new DnsQueryException("Invalid DNS Record Type in DNS Response", null);
}
}
catch (Exception ex)
{
_data = new ExceptionRecord(ex.Message);
throw ex;
}
}
public DnsAnswer(byte[] response)
{
_questions = new List <Question>();
_answers = new List <Answer>();
_servers = new List <Server>();
_additional = new List <Record>();
_exceptions = new List <Exception>();
DataBuffer buffer = new DataBuffer(response, 2);
byte bits1 = buffer.ReadByte();
byte bits2 = buffer.ReadByte();
//Mask off return code
int returnCode = bits2 & 15;
if (returnCode > 6)
{
returnCode = 6;
}
this._returnCode = (ReturnCode)returnCode;
//Get Additional Flags
_authoritative = TestBit(bits1, 2);
_recursive = TestBit(bits2, 8);
_truncated = TestBit(bits1, 1);
int nQuestions = buffer.ReadBEShortInt();
int nAnswers = buffer.ReadBEShortInt();
int nServers = buffer.ReadBEShortInt();
int nAdditional = buffer.ReadBEShortInt();
//read in questions
for (int i = 0; i < nQuestions; i++)
{
try
{
_questions.Add(new Question(buffer));
}
catch (Exception ex)
{
_exceptions.Add(ex);
}
}
//read in answers
for (int i = 0; i < nAnswers; i++)
{
try
{
_answers.Add(new Answer(buffer));
}
catch (Exception ex)
{
_exceptions.Add(ex);
}
}
//read in servers
for (int i = 0; i < nServers; i++)
{
try
{
_servers.Add(new Server(buffer));
}
catch (Exception ex)
{
_exceptions.Add(ex);
}
}
//read in additional records
for (int i = 0; i < nAdditional; i++)
{
try
{
_additional.Add(new Record(buffer));
}
catch (Exception ex)
{
_exceptions.Add(ex);
}
}
}
