internal DnsServerResponse(bool connectionOk, RCODE rcode, List <DNS_rr_base> answers, List <DNS_rr_base> authoritiveAnswers, List <DNS_rr_base> additionalAnswers)
{
m_Success = connectionOk;
m_RCODE = rcode;
m_pAnswers = answers;
m_pAuthoritiveAnswers = authoritiveAnswers;
m_pAdditionalAnswers = additionalAnswers;
}
internal DnsServerResponse(bool connectionOk,RCODE rcode,ArrayList answers,ArrayList authoritiveAnswers,ArrayList additionalAnswers)
{
m_Success = connectionOk;
m_RCODE = rcode;
m_pAnswers = answers;
m_pAuthoritiveAnswers = authoritiveAnswers;
m_pAdditionalAnswers = additionalAnswers;
}
internal DnsServerResponse(bool connectionOk,RCODE rcode,List<DnsRecordBase> answers,List<DnsRecordBase> authoritiveAnswers,List<DnsRecordBase> additionalAnswers)
{
m_Success = connectionOk;
m_RCODE = rcode;
m_pAnswers = answers;
m_pAuthoritiveAnswers = authoritiveAnswers;
m_pAdditionalAnswers = additionalAnswers;
}
internal DnsServerResponse(bool connectionOk, RCODE rcode, ArrayList answers, ArrayList authoritiveAnswers, ArrayList additionalAnswers)
{
m_Success = connectionOk;
m_RCODE = rcode;
m_pAnswers = answers;
m_pAuthoritiveAnswers = authoritiveAnswers;
m_pAdditionalAnswers = additionalAnswers;
}
internal bool ParseHeader(byte[] query)
{
try
{
/*
* 1 1 1 1 1 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ID |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|QR| Opcode |AA|TC|RD|RA| Z | RCODE |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| QDCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ANCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| NSCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ARCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|
| QDCOUNT
| an unsigned 16 bit integer specifying the number of
| entries in the question section.
|
| ANCOUNT
| an unsigned 16 bit integer specifying the number of
| resource records in the answer section.
*/
//----- Parse query headers -----------------------------//
// Get reply code
var id = (query[0] << 8 | query[1]);
var opcode = ((query[2] >> 3) & 15);
var replyCode = (query[3] & 15);
var queryCount = (query[4] << 8 | query[5]);
var answerCount = (query[6] << 8 | query[7]);
var nsCount = (query[8] << 8 | query[9]);
var arCount = (query[10] << 8 | query[11]);
//-------------------------------------------------------//
m_QID = id;
m_OPCODE = (OPCODE)opcode;
m_RCODE = (RCODE)replyCode;
m_QDCOUNT = queryCount;
m_ANCOUNT = answerCount;
m_NSCOUNT = nsCount;
m_ARCOUNT = arCount;
return(true);
}
catch
{
return(false);
}
}
public RCODE reportError(
ref RestoreAction peRestoreAction,
RCODE rcErr)
{
peRestoreAction = RestoreAction.XFLM_RESTORE_ACTION_CONTINUE;
System.Console.WriteLine("\nError reported: {0}", rcErr);
m_bOutputLines = true;
return(RCODE.NE_XFLM_OK);
}
public override string ToString()
{
switch (QR)
{
case DNS.QR.Q:
return(string.Format("Request: {0}",
OPCODE.ToString()
));
case DNS.QR.R:
return(string.Format("{0}: {1} RD={2} RA={3} {4} {5}",
(AA ? "Authoritative Response" : "Non-Authoritative Response"),
OPCODE.ToString(),
(RD ? "1" : "0"),
(RA ? "1" : "0"),
RCODE.ToString(),
(TC ? "TRUNCATED " : "")
));
}
// throw new InvalidOperationException("Unexpected QR value.");
// CA1065 Do not raise exceptions in unexpected locations
return(null);
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="rcode">DNS server returned error code.</param>
public DNS_ClientException(RCODE rcode) : base("Dns error: " + rcode + ".")
{
m_RCode = rcode;
}
internal bool ParseHeader(byte[] query)
{
try
{
/*
1 1 1 1 1 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ID |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|QR| Opcode |AA|TC|RD|RA| Z | RCODE |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| QDCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ANCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| NSCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ARCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
QDCOUNT
an unsigned 16 bit integer specifying the number of
entries in the question section.
ANCOUNT
an unsigned 16 bit integer specifying the number of
resource records in the answer section.
*/
//----- Parse query headers -----------------------------//
// Get reply code
int id = (query[0] << 8 | query[1]);
int opcode = ((query[2] >> 3) & 15);
int replyCode = (query[3] & 15);
int queryCount = (query[4] << 8 | query[5]);
int answerCount = (query[6] << 8 | query[7]);
int nsCount = (query[8] << 8 | query[9]);
int arCount = (query[10] << 8 | query[11]);
//-------------------------------------------------------//
m_QID = id;
m_OPCODE = (OPCODE)opcode;
m_RCODE = (RCODE)replyCode;
m_QDCOUNT = queryCount;
m_ANCOUNT = answerCount;
m_NSCOUNT = nsCount;
m_ARCOUNT = arCount;
return true;
}
catch{
return false;
}
}
public DnsException(RCODE responseCode, string message)
: base(message)
{
this.ResponseCode = responseCode;
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="rcode">DNS server returned error code.</param>
public DNS_ClientException(RCODE rcode)
{
m_RCode = rcode;
}
internal DnsServerResponse(bool connectionOk, RCODE rcode, ArrayList answers)
{
m_Success = connectionOk;
m_pRCODE = rcode;
m_pAnswers = answers;
}
/// <summary>
/// XFLAIM Exception that returns a message.
/// </summary>
/// <param name="message">Message explaining cause of exception.</param>
public XFlaimException(
string message)
{
m_message = message;
m_rc = 0;
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="rcode">DNS server returned error code.</param>
public DNS_ClientException(RCODE rcode)
{
m_RCode = rcode;
}
/// <summary>
/// Parses answer.
/// </summary>
/// <param name="reply"></param>
/// <param name="queryID"></param>
/// <returns>Returns Dns_Answer[] collection if answer parsed successfully or throws exception if failed.</returns>
private DnsServerResponse ParseAnswers(byte[] reply, int queryID)
{
//--- Parse headers ------------------------------------//
/*
* 1 1 1 1 1 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ID |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|QR| Opcode |AA|TC|RD|RA| Z | RCODE |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| QDCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ANCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| NSCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ARCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|
| QDCOUNT
| an unsigned 16 bit integer specifying the number of
| entries in the question section.
|
| ANCOUNT
| an unsigned 16 bit integer specifying the number of
| resource records in the answer section.
*/
// Get reply code
int id = (reply[0] << 8 | reply[1]);
OPCODE opcode = (OPCODE)((reply[2] >> 3) & 15);
RCODE replyCode = (RCODE)(reply[3] & 15);
int queryCount = (reply[4] << 8 | reply[5]);
int answerCount = (reply[6] << 8 | reply[7]);
int nsCount = (reply[8] << 8 | reply[9]);
int arCount = (reply[10] << 8 | reply[11]);
//---- End of headers ---------------------------------//
// Check that it's query what we want
if (queryID != id)
{
throw new Exception("This isn't query with ID what we expected");
}
int pos = 12;
//----- Parse question part ------------//
for (int q = 0; q < queryCount; q++)
{
string dummy = "";
GetQName(reply, ref pos, ref dummy);
//qtype + qclass
pos += 4;
}
//--------------------------------------//
/*
* 1 1 1 1 1 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| |
| / /
| / NAME /
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| TYPE |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| CLASS |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| TTL |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| RDLENGTH |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--|
| / RDATA /
| / /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
*/
ArrayList answers = new ArrayList();
//---- Start parsing aswers ------------------------------------------------------------------//
for (int i = 0; i < answerCount; i++)
{
string name = "";
if (!GetQName(reply, ref pos, ref name))
{
throw new Exception("Error parisng anser");
}
int type = reply[pos++] << 8 | reply[pos++];
int rdClass = reply[pos++] << 8 | reply[pos++];
int ttl = reply[pos++] << 24 | reply[pos++] << 16 | reply[pos++] << 8 | reply[pos++];
int rdLength = reply[pos++] << 8 | reply[pos++];
object answerObj = null;
switch ((QTYPE)type)
{
case QTYPE.A:
answerObj = ParseARecord(reply, ref pos, rdLength);
pos += rdLength;
break;
case QTYPE.NS:
answerObj = ParseNSRecord(reply, ref pos, rdLength);
// pos += rdLength;
break;
case QTYPE.CNAME:
answerObj = ParseCNAMERecord(reply, ref pos, rdLength);
// pos += rdLength;
break;
case QTYPE.PTR:
answerObj = ParsePTRRecord(reply, ref pos, rdLength);
// pos += rdLength;
break;
case QTYPE.MX:
answerObj = ParseMxRecord(reply, ref pos);
break;
case QTYPE.TXT:
answerObj = ParseTXTRecord(reply, ref pos, rdLength);
break;
case QTYPE.AAAA:
answerObj = ParseAAAARecord(reply, ref pos, rdLength);
pos += rdLength;
break;
default:
answerObj = "dummy"; // Dummy place holder for now
pos += rdLength;
break;
}
// Add answer to answer list
if (answerObj != null)
{
answers.Add(answerObj);
}
}
//-------------------------------------------------------------------------------------------//
return(new DnsServerResponse(true, replyCode, answers));
}
private static extern void xflaim_Db_setMustAbortTrans( IntPtr pDb, RCODE rc);
//-----------------------------------------------------------------------------
// setMustAbortTrans
//-----------------------------------------------------------------------------
/// <summary>
/// Force the current transaction to abort. This method should be called
/// when the code should not be the code that aborts the transation, but
/// wants to require that the transaction be aborted by whatever module has
/// the authority to abort the transaction. An error code may be
/// set to indicate what error condition is causing the transaction to be
/// aborted.
/// </summary>
/// <param name="rc">
/// Error code that indicates why the transaction is aborting.
/// </param>
public void setMustAbortTrans(
RCODE rc)
{
xflaim_Db_setMustAbortTrans( m_pDb, rc);
}
public RCODE reportError(
ref RestoreAction peRestoreAction,
RCODE rcErr)
{
peRestoreAction = RestoreAction.XFLM_RESTORE_ACTION_CONTINUE;
System.Console.WriteLine( "\nError reported: {0}", rcErr);
m_bOutputLines = true;
return( RCODE.NE_XFLM_OK);
}
/// <summary>
/// Parses query.
/// </summary>
/// <param name="reply">Dns server reply.</param>
/// <param name="queryID">Query id of sent query.</param>
/// <returns></returns>
private DnsServerResponse ParseQuery(byte[] reply, int queryID)
{
//--- Parse headers ------------------------------------//
/* RFC 1035 4.1.1. Header section format
*
* 1 1 1 1 1 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ID |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|QR| Opcode |AA|TC|RD|RA| Z | RCODE |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| QDCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ANCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| NSCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| ARCOUNT |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|
| QDCOUNT
| an unsigned 16 bit integer specifying the number of
| entries in the question section.
|
| ANCOUNT
| an unsigned 16 bit integer specifying the number of
| resource records in the answer section.
|
| NSCOUNT
| an unsigned 16 bit integer specifying the number of name
| server resource records in the authority records section.
|
| ARCOUNT
| an unsigned 16 bit integer specifying the number of
| resource records in the additional records section.
|
*/
// Get reply code
int id = (reply[0] << 8 | reply[1]);
OPCODE opcode = (OPCODE)((reply[2] >> 3) & 15);
RCODE replyCode = (RCODE)(reply[3] & 15);
int queryCount = (reply[4] << 8 | reply[5]);
int answerCount = (reply[6] << 8 | reply[7]);
int authoritiveAnswerCount = (reply[8] << 8 | reply[9]);
int additionalAnswerCount = (reply[10] << 8 | reply[11]);
//---- End of headers ---------------------------------//
// Check that it's query what we want
if (queryID != id)
{
throw new Exception("This isn't query with ID what we expected");
}
int pos = 12;
//----- Parse question part ------------//
for (int q = 0; q < queryCount; q++)
{
string dummy = "";
GetQName(reply, ref pos, ref dummy);
//qtype + qclass
pos += 4;
}
//--------------------------------------//
// 1) parse answers
// 2) parse authoritive answers
// 3) parse additional answers
List <DNS_rr_base> answers = ParseAnswers(reply, answerCount, ref pos);
List <DNS_rr_base> authoritiveAnswers = ParseAnswers(reply, authoritiveAnswerCount, ref pos);
List <DNS_rr_base> additionalAnswers = ParseAnswers(reply, additionalAnswerCount, ref pos);
return(new DnsServerResponse(true, replyCode, answers, authoritiveAnswers, additionalAnswers));
}
/// <summary>
/// XFLAIM Exception that returns an RCODE.
/// </summary>
/// <param name="rc">The error code that occurred.</param>
public XFlaimException(
RCODE rc)
{
m_rc = rc;
m_message = null;
}
