internal static ResourceRecord ReadFrom(PacketReader reader)
{
string name = reader.ReadName();
RecordType type = (RecordType)reader.ReadUShort();
RecordClass rClass = (RecordClass)reader.ReadUShort();
DateTime expiry = DateTime.UtcNow + TimeSpan.FromSeconds(reader.ReadInt());
switch (type)
{
case RecordType.Pointer:
return new PointerRecord(name, type, rClass, expiry, reader);
case RecordType.CanonicalName:
return new CanonicalNameRecord(name, type, rClass, expiry, reader);
case RecordType.Address:
return new IP4AddressRecord(name, type, rClass, expiry, reader);
case RecordType.Text:
return new TextRecord(name, type, rClass, expiry, reader);
case RecordType.Service:
return new ServiceRecord(name, type, rClass, expiry, reader);
default:
int len = reader.ReadUShort();
reader.Position += len;
return new ResourceRecord(name, type, rClass, expiry);
}
}
internal static ResourceRecord ReadFrom(PacketReader reader)
{
string name = reader.ReadName();
RecordType type = (RecordType)reader.ReadUShort();
RecordClass rClass = (RecordClass)reader.ReadUShort();
DateTime expiry = DateTime.UtcNow + TimeSpan.FromSeconds(reader.ReadInt());
switch (type)
{
case RecordType.Pointer:
return(new PointerRecord(name, type, rClass, expiry, reader));
case RecordType.CanonicalName:
return(new CanonicalNameRecord(name, type, rClass, expiry, reader));
case RecordType.Address:
return(new IP4AddressRecord(name, type, rClass, expiry, reader));
case RecordType.Text:
return(new TextRecord(name, type, rClass, expiry, reader));
case RecordType.Service:
return(new ServiceRecord(name, type, rClass, expiry, reader));
default:
int len = reader.ReadUShort();
reader.Position += len;
return(new ResourceRecord(name, type, rClass, expiry));
}
}
internal CanonicalNameRecord(string name, RecordType type, RecordClass rClass, DateTime expiry, PacketReader reader)
: base(name, type, rClass, expiry)
{
ushort dataLen = reader.ReadUShort();
int pos = reader.Position;
_canonicalName = reader.ReadName();
reader.Position = pos + dataLen;
}
internal PointerRecord(string name, RecordType type, RecordClass rClass, DateTime expiry, PacketReader reader)
: base(name, type, rClass, expiry)
{
ushort dataLen = reader.ReadUShort();
int pos = reader.Position;
_targetName = reader.ReadName();
reader.Position = pos + dataLen;
}
internal ServiceRecord(string name, RecordType type, RecordClass rClass, DateTime expiry, PacketReader reader)
: base(name, type, rClass, expiry)
{
ushort dataLen = reader.ReadUShort();
int pos = reader.Position;
_priority = reader.ReadUShort();
_weight = reader.ReadUShort();
_port = reader.ReadUShort();
_target = reader.ReadName();
reader.Position = pos + dataLen;
}
internal ServiceRecord(string name, RecordType type, RecordClass rClass, DateTime expiry, PacketReader reader)
: base(name, type, rClass, expiry)
{
ushort dataLen = reader.ReadUShort();
int pos = reader.Position;
_priority = reader.ReadUShort();
_weight = reader.ReadUShort();
_port = reader.ReadUShort();
_target = reader.ReadName();
reader.Position = pos + dataLen;
}