internal static DnsOptions Read(DataSegment data)
{
List <DnsOption> options = new List <DnsOption>();
while (data.Length != 0)
{
if (data.Length < DnsOption.MinimumLength)
{
return(null);
}
DnsOptionCode code = (DnsOptionCode)data.ReadUShort(0, Endianity.Big);
ushort optionDataLength = data.ReadUShort(sizeof(ushort), Endianity.Big);
int optionLength = DnsOption.MinimumLength + optionDataLength;
if (data.Length < optionLength)
{
return(null);
}
DnsOption option = DnsOption.CreateInstance(code, data.Subsegment(DnsOption.MinimumLength, optionDataLength));
if (option == null)
{
return(null);
}
options.Add(option);
data = data.Subsegment(optionLength, data.Length - optionLength);
}
return(new DnsOptions(options));
}
internal override bool EqualsData(DnsOption other)
{
DnsOptionLongLivedQuery castedOther = (DnsOptionLongLivedQuery)other;
return(Version.Equals(castedOther.Version) &&
OpCode.Equals(castedOther.OpCode) &&
ErrorCode.Equals(castedOther.ErrorCode) &&
Id.Equals(castedOther.Id) &&
LeaseLife.Equals(castedOther.LeaseLife));
}
internal override bool EqualsData(DnsOption other)
{
return(EqualsData(other as DnsOptionClientSubnet));
}
