private SOA_Record ParseSOARecord(byte[] reply,ref int offset,int rdLength,int ttl)
{
/* RFC 1035 3.3.13. SOA RDATA format
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/ MNAME /
/ /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
/ RNAME /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| SERIAL |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| REFRESH |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| RETRY |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| EXPIRE |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| MINIMUM |
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
where:
MNAME The <domain-name> of the name server that was the
original or primary source of data for this zone.
RNAME A <domain-name> which specifies the mailbox of the
person responsible for this zone.
SERIAL The unsigned 32 bit version number of the original copy
of the zone. Zone transfers preserve this value. This
value wraps and should be compared using sequence space
arithmetic.
REFRESH A 32 bit time interval before the zone should be
refreshed.
RETRY A 32 bit time interval that should elapse before a
failed refresh should be retried.
EXPIRE A 32 bit time value that specifies the upper limit on
the time interval that can elapse before the zone is no
longer authoritative.
MINIMUM The unsigned 32 bit minimum TTL field that should be
exported with any RR from this zone.
*/
//---- Parse record -------------------------------------------------------------//
// MNAME
string nameserver = "";
GetQName(reply,ref offset,ref nameserver);
// RNAME
string adminMailBox = "";
GetQName(reply,ref offset,ref adminMailBox);
char[] adminMailBoxAr = adminMailBox.ToCharArray();
for(int i=0;i<adminMailBoxAr.Length;i++){
if(adminMailBoxAr[i] == '.'){
adminMailBoxAr[i] = '@';
break;
}
}
adminMailBox = new string(adminMailBoxAr);
// SERIAL
long serial = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
// REFRESH
long refresh = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
// RETRY
long retry = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
// EXPIRE
long expire = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
// MINIMUM
long minimum = reply[offset++] << 24 | reply[offset++] << 16 | reply[offset++] << 8 | reply[offset++];
//--------------------------------------------------------------------------------//
return new SOA_Record(nameserver,adminMailBox,serial,refresh,retry,expire,minimum,ttl);
}
