public DnsResourceRecord GetRecord(ResourceRecordInfo info)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
var oldIndex = _reader.Index;
DnsResourceRecord result;
switch (info.RecordType)
{
case ResourceRecordType.A:
result = new ARecord(info, _reader.ReadIPAddress());
break;
case ResourceRecordType.NS:
result = new NsRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.CNAME:
result = new CNameRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.SOA:
result = ResolveSoaRecord(info);
break;
case ResourceRecordType.MB:
result = new MbRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.MG:
result = new MgRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.MR:
result = new MrRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.NULL:
result = new NullRecord(info, _reader.ReadBytes(info.RawDataLength).ToArray());
break;
case ResourceRecordType.WKS:
result = ResolveWksRecord(info);
break;
case ResourceRecordType.PTR:
result = new PtrRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.HINFO:
result = new HInfoRecord(info, _reader.ReadStringWithLengthPrefix(), _reader.ReadStringWithLengthPrefix());
break;
case ResourceRecordType.MINFO:
result = new MInfoRecord(info, _reader.ReadDnsName(), _reader.ReadDnsName());
break;
case ResourceRecordType.MX:
result = ResolveMXRecord(info);
break;
case ResourceRecordType.TXT:
result = ResolveTXTRecord(info);
break;
case ResourceRecordType.RP:
result = new RpRecord(info, _reader.ReadDnsName(), _reader.ReadDnsName());
break;
case ResourceRecordType.AFSDB:
result = new AfsDbRecord(info, (AfsType)_reader.ReadUInt16NetworkOrder(), _reader.ReadDnsName());
break;
case ResourceRecordType.AAAA:
result = new AaaaRecord(info, _reader.ReadIPv6Address());
break;
case ResourceRecordType.SRV:
result = ResolveSrvRecord(info);
break;
case ResourceRecordType.OPT:
result = ResolveOptRecord(info);
break;
case ResourceRecordType.URI:
result = ResolveUriRecord(info);
break;
case ResourceRecordType.CAA:
result = ResolveCaaRecord(info);
break;
case ResourceRecordType.SSHFP:
result = ResolveSshfpRecord(info);
break;
default:
result = new UnknownRecord(info, _reader.ReadBytes(info.RawDataLength).ToArray());
break;
}
// sanity check
_reader.SanitizeResult(oldIndex + info.RawDataLength, info.RawDataLength);
return(result);
}
public DnsResourceRecord GetRecord(ResourceRecordInfo info)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
var oldIndex = _reader.Index;
DnsResourceRecord result;
switch (info.RecordType)
{
case ResourceRecordType.A:
result = new ARecord(info, _reader.ReadIPAddress());
break;
case ResourceRecordType.NS:
result = new NsRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.CNAME:
result = new CNameRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.SOA:
result = ResolveSoaRecord(info);
break;
case ResourceRecordType.MB:
result = new MbRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.MG:
result = new MgRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.MR:
result = new MrRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.NULL:
result = new NullRecord(info, _reader.ReadBytes(info.RawDataLength).ToArray());
break;
case ResourceRecordType.WKS:
result = ResolveWksRecord(info);
break;
case ResourceRecordType.PTR:
result = new PtrRecord(info, _reader.ReadDnsName());
break;
case ResourceRecordType.HINFO:
result = new HInfoRecord(info, _reader.ReadString(), _reader.ReadString());
break;
case ResourceRecordType.MINFO:
result = new MInfoRecord(info, _reader.ReadDnsName(), _reader.ReadDnsName());
break;
case ResourceRecordType.MX:
result = ResolveMXRecord(info);
break;
case ResourceRecordType.TXT:
result = ResolveTXTRecord(info);
break;
case ResourceRecordType.RP:
result = new RpRecord(info, _reader.ReadDnsName(), _reader.ReadDnsName());
break;
case ResourceRecordType.AFSDB:
result = new AfsDbRecord(info, (AfsType)_reader.ReadUInt16NetworkOrder(), _reader.ReadDnsName());
break;
case ResourceRecordType.AAAA:
result = new AaaaRecord(info, _reader.ReadIPv6Address());
break;
case ResourceRecordType.SRV:
result = ResolveSrvRecord(info);
break;
case ResourceRecordType.OPT:
result = ResolveOptRecord(info);
break;
case ResourceRecordType.URI:
result = ResolveUriRecord(info);
break;
case ResourceRecordType.CAA:
result = ResolveCaaRecord(info);
break;
default:
// update reader index because we don't read full data for the empty record
_reader.Index += info.RawDataLength;
result = new EmptyRecord(info);
break;
}
// sanity check
if (_reader.Index != oldIndex + info.RawDataLength)
{
throw new InvalidOperationException("Record reader index out of sync.");
}
return(result);
}
public override int Compare(DnsRecord x, DnsRecord y)
{
if (x == y)
{
return(0);
}
if (x == null)
{
return(-1);
}
if (y == null)
{
return(1);
}
int res = 0;
if ((res = x.Type.ToString().CompareTo(y.Type.ToString())) == 0 &&
(res = x.Owner.CompareTo(y.Owner)) == 0)
{
switch (x.Type)
{
case DnsRecordType.NS:
res = ((NSRecord)x).Domain.CompareTo(((NSRecord)y).Domain);
break;
case DnsRecordType.CName:
res = ((CNameRecord)x).Canonical.CompareTo(((CNameRecord)y).Canonical);
break;
case DnsRecordType.DN:
res = ((DNRecord)x).Target.CompareTo(((DNRecord)y).Target);
break;
case DnsRecordType.Ptr:
res = ((PtrRecord)x).Domain.CompareTo(((PtrRecord)y).Domain);
break;
case DnsRecordType.HInfo:
HInfoRecord xHInfo = (HInfoRecord)x;
HInfoRecord yHInfo = (HInfoRecord)y;
if ((res = xHInfo.Cpu.CompareTo(yHInfo.Cpu)) == 0)
{
res = xHInfo.Os.CompareTo(yHInfo.Os);
}
break;
case DnsRecordType.MInfo:
MInfoRecord xMInfo = (MInfoRecord)x;
MInfoRecord yMInfo = (MInfoRecord)y;
if ((res = xMInfo.RMbox.CompareTo(yMInfo.RMbox)) == 0)
{
res = xMInfo.EMbox.CompareTo(yMInfo.EMbox);
}
break;
case DnsRecordType.MX:
MXRecord xMx = (MXRecord)x;
MXRecord yMx = (MXRecord)y;
if ((res = xMx.CompareTo(yMx)) == 0)
{
res = xMx.Exchange.CompareTo(yMx.Exchange);
}
break;
case DnsRecordType.MB:
res = ((MBRecord)x).Mailbox.CompareTo(((MBRecord)y).Mailbox);
break;
case DnsRecordType.MG:
res = ((MGRecord)x).Mailbox.CompareTo(((MGRecord)y).Mailbox);
break;
case DnsRecordType.MR:
res = ((MRRecord)x).NewMailbox.CompareTo(((MRRecord)y).NewMailbox);
break;
case DnsRecordType.Txt:
res = ((TxtRecord)x).Text.CompareTo(((TxtRecord)y).Text);
break;
case DnsRecordType.Spf:
res = ((SpfRecord)x).Specification.CompareTo(((SpfRecord)y).Specification);
break;
case DnsRecordType.Srv:
SrvRecord xSrv = (SrvRecord)x;
SrvRecord ySrv = (SrvRecord)y;
if ((res = xSrv.CompareTo(ySrv)) == 0)
{
res = xSrv.Target.CompareTo(ySrv.Target);
}
break;
default:
res = 0;
break;
}
}
return(res);
}
