public void EncodeRecord(IDnsRecord record, IByteBuffer output)
{
if (record is IDnsQuestion)
{
EncodeQuestion((IDnsQuestion)record, output);
}
else if (record is IDnsPtrRecord)
{
EncodePtrRecord((IDnsPtrRecord)record, output);
}
else if (record is IDnsOptEcsRecord)
{
EncodeOptEcsRecord((IDnsOptEcsRecord)record, output);
}
else if (record is IDnsOptPseudoRecord)
{
EncodeOptPseudoRecord((IDnsOptPseudoRecord)record, output);
}
else if (record is IDnsRawRecord)
{
EncodeRawRecord((IDnsRawRecord)record, output);
}
else
{
throw new UnsupportedMessageTypeException(record.Type.Name);
}
}
public IDnsRecord DecodeRecord(IByteBuffer inputBuffer)
{
int startOffset = inputBuffer.ReaderIndex;
string name = DecodeName(inputBuffer);
int endOffset = inputBuffer.WriterIndex;
if (endOffset - startOffset < 10)
{
inputBuffer.SetReaderIndex(startOffset);
return(null);
}
DnsRecordType type = DnsRecordType.From(inputBuffer.ReadUnsignedShort());
var recordClass = (DnsRecordClass)inputBuffer.ReadUnsignedShort();
long ttl = inputBuffer.ReadUnsignedInt();
int length = inputBuffer.ReadUnsignedShort();
int offset = inputBuffer.ReaderIndex;
if (endOffset - offset < length)
{
inputBuffer.SetReaderIndex(startOffset);
return(null);
}
IDnsRecord record = DecodeRecord(name, type, recordClass, ttl, inputBuffer, offset, length);
inputBuffer.SetReaderIndex(offset + length);
return(record);
}
private void EncodeRecordCore(IDnsRecord record, IByteBuffer output)
{
EncodeName(record.Name, output);
output.WriteShort(record.Type.IntValue);
output.WriteShort((int)record.DnsClass);
output.WriteInt((int)record.TimeToLive);
}
public void AddRecord(DnsSection section, IDnsRecord record)
{
CheckQuestion(section, record);
object records = SectionAt(section);
if (records == null)
{
SetSection(section, record);
return;
}
List <IDnsRecord> recordList;
if (records is IDnsRecord)
{
recordList = new List <IDnsRecord>(2);
recordList.Add((IDnsRecord)records);
recordList.Add(record);
SetSection(section, recordList);
return;
}
recordList = (List <IDnsRecord>)records;
recordList.Add(record);
}
public void SetRecord(DnsSection section, int index, IDnsRecord record)
{
CheckQuestion(section, record);
object records = SectionAt(section);
if (records == null)
{
throw new IndexOutOfRangeException($"index: {index} (expected: none)");
}
if (records is IDnsRecord)
{
if (index == 0)
{
SetSection(section, record);
}
else
{
throw new IndexOutOfRangeException($"index: {index} (expected: 0)");
}
}
List <IDnsRecord> recordList = (List <IDnsRecord>)records;
recordList[index] = record;
}
private static void CheckQuestion(DnsSection section, IDnsRecord record)
{
if (section == SECTION_QUESTION &&
record != null &&
!(record is IDnsQuestion))
{
throw new ArgumentException($"record: {record} (expected: DnsQuestion)");
}
}
private void DecodeRecords(IDnsQuery query, DnsSection section, IByteBuffer buffer, int count)
{
for (int i = count; i > 0; i--)
{
IDnsRecord r = recordDecoder.DecodeRecord(buffer);
if (r == null)
{
break;
}
query.AddRecord(section, r);
}
}
private void DecodeRecords(IDnsResponse response, DnsSection section, IByteBuffer buffer, int count)
{
for (int i = count - 1; i > 0; i--)
{
IDnsRecord r = recordDecoder.DecodeRecord(buffer);
if (r == null)
{
break;
}
response.AddRecord(section, r);
}
}
public void AddRecord(DnsSection section, int index, IDnsRecord record)
{
CheckQuestion(section, record);
object records = SectionAt(section);
if (records == null)
{
if (index != 0)
{
throw new IndexOutOfRangeException($"index: {index} (expected: 0)");
}
SetSection(section, record);
return;
}
List <IDnsRecord> recordList;
if (records is IDnsRecord)
{
if (index == 0)
{
recordList = new List <IDnsRecord>();
recordList.Add(record);
recordList.Add((IDnsRecord)records);
}
else if (index == 1)
{
recordList = new List <IDnsRecord>();
recordList.Add((IDnsRecord)records);
recordList.Add(record);
}
else
{
throw new IndexOutOfRangeException($"index: {index} (expected: 0 or 1)");
}
SetSection(section, recordList);
return;
}
recordList = (List <IDnsRecord>)records;
recordList[index] = record;
}
public void SetRecord(DnsSection section, IDnsRecord record)
{
Clear(section);
SetSection(section, record);
}
