> On 19 Mar 2020, at 15:03, Benjamin Kaduk via Datatracker <[email protected]> > wrote: > > * Other Len - an unsigned 16-bit integer specifying the length > of the "Other Data" field in octets. > > * Other Data - this unsigned 48-bit integer field will be > empty unless the content of the Error field is BADTIME, in > which case it will contain the server's current time as the > number of seconds since 00:00 on 1970-01-01 UTC, ignoring > leap seconds (see Section 5.2.3). > > I'm slightly confused at the interplay between the explicit length field > and the "empty unless" directive. Does this mean that the only allowed > values in the "Other Len" are 0 and 6? Does "empty" mean "length-zero”?
The only current use of this field is to pass the time which is 48 bits. Potential future use is covered in draft-andrews-dnsop-defeat-frag-attack-00 to provide a transaction nonce. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: [email protected] _______________________________________________ DNSOP mailing list [email protected] https://www.ietf.org/mailman/listinfo/dnsop
