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AS information available via DNS
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Havard Eidnes
Havard.Eidnes at runit.sintef.no
Wed May 12 13:03:39 CEST 1993
> * > [mature-tony-1480] host -lt txt as1104.aut-num.ripe.net > * > AS1104.aut-num.ripe.net TXT 192.16.185.0 > * > AS1104.aut-num.ripe.net TXT 192.16.186.0 > * > AS1104.aut-num.ripe.net TXT 192.16.194.0 > * > AS1104.aut-num.ripe.net TXT 192.16.195.0 > * > AS1104.aut-num.ripe.net TXT 192.16.199.0 > * > AS1104.aut-num.ripe.net TXT 192.87.45.0 > * ... > * I'm not sure of what a solution to this problem should be, however, or > * whether we just ignore the problem. > > That was my feeling too. If people like the idea and we can reliably use > it for the update procedure then I'll just make sure we either make > "warning" documentation to use TCP based queries or we put up a good > resolver. I've given this some further thought, and a possibility could be to do it like this: $origin as224.aut-num.ripe.net. @ IN SOA ... ; @ NS ... @ NS ... ; 1 A 32.0.0.0 2 A 128.39.0.0 3 A 129.177.0.0 4 A 129.240.0.0 ; etc. Since you are primarily concerned with the value parts of the RRs in the zone, the labels you use to identify each individual entry is of lesser concern. This avoids the problem of truncated UDP response packets, but also removes the possibility to retrieve the network list by using a single DNS query (over TCP). Instead, one have to use a zone transfer to accomplish the same task. I'm not sure this is a desireable solution... I think the technically more correct thing would be to deploy/distribute (contribute to BIND) a better resolver library but it will take a while for it to be widely distributed (eg. via vendors). - Havard
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