private DnsResourceRecord ResolveUriRecord(ResourceRecordInfo info)
{
var prio = _reader.ReadUInt16NetworkOrder();
var weight = _reader.ReadUInt16NetworkOrder();
var target = _reader.ReadString(info.RawDataLength - 4);
return(new UriRecord(info, prio, weight, target));
}
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);
}