In message <21881.57848.956801.244...@gro.dd.org>, Dave Lawrence writes: > Mark Andrews writes: > > why is the last sentence here with a SHOULD. > > It technically doesn't hurt anything to include them, because the > option length field of the opt rdata tells you how long the variable > part is. If there is an important technical reason that MUST is > required here for interoperability I'm happy to change it, but it does > not appear to be a fundamental requirement.
Well it makes extra work for parsers for no good reason. 10.0.0.0/7 requires checking 3 extra octets for all zeros. Thats additional code that needs to be written to cover the SHOULD that doesn't need to be written to cover a MUST. > > o ADDRESS, variable number of octets, contains either an IPv4 or > > IPv6 address, depending on FAMILY, truncated to the number of bits > > indicated by the SOURCE PREFIX-LENGTH field, with bits set to 0 to > > pad to the end of the last octet needed. Trailing all-zero octets > > SHOULD be omitted. > > _______________________________________________ > DNSOP mailing list > DNSOP@ietf.org > https://www.ietf.org/mailman/listinfo/dnsop -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
