]] Roger Leigh | On Sun, Aug 02, 2009 at 08:39:46AM +0200, Tollef Fog Heen wrote: | > ]] Roger Leigh | > | > | Having working local networking is important. We wouldn't consider | > | broken IPv4 loopback acceptable, and broken IPv6 loopback is just as | > | bad. | > | > Sure, having it working is important. Is it more important than keeping | > those (often new) users for whom Debian appears useless because of its | > perceived poor network performance? | | It would be nice if both worked. But, in the absence of good heuristics | for detecting broken networking, this is probably something that should | not be done automatically.
Both would be nice, of course. Sometimes you have to choose between having the cake and eating it, though. | > Anyway, IIRC this is now solved in glibc by sending out the queries in | > parallel and returning the first answer you get. | | OK. What happens to the other answer(s) though? Does this mean that | getaddrinfo(3) skips slow replies completely? This is surely equally | broken if so? Unsure. The man page for getaddrinfo doesn't seem to imply that you get all answers if you specify AF_UNSPEC, it specifies «any». Your test program does get both the A and the AAAA record, so my recollection of this might be incorrect. [...] | > | The idea behind the patch isn't bad, but the implementation proposed | > | here is too naïve. The assumption that you only want working IPv6 | > | name resolution when you have a globally-scoped IPv6 address is too | > | simplistic. | > | > FWIW, it roughly matches what Mac OS X and Windows do. | | And it's not considered broken on these platforms too? You're talking about 0.07% of the users for Windows Vista (and 0.03% for XP), Mac OS X is at a whopping 2.4%. I doubt many users would see if their IPv6 was broken since there are few/no IPv6 services out there. (From http://www.ripe.net/ripe/meetings/ripe-57/presentations/Colitti-Global_IPv6_statistics_-_Measuring_the_current_state_of_IPv6_for_ordinary_users_.7gzD.pdf ) | Probably not conciously; it's intended to be used automatically. A | quick google shows Avahi does use these (with some caveats). | | IPv6 has the concept of "Scope", and these scopes include Node/Host, | Link, Site, Organisation, and Global. To assume that IPv6 networking | is only active when you have one or more Global addresses is an | incorrect assumption. With the previous glibc patch, my networking | broke as the Global link went up and down. It did actually put the threshold at site, not global, since people could reasonably put site-only names into DNS, but link-local addresses shouldn't be in DNS. -- Tollef Fog Heen UNIX is user friendly, it's just picky about who its friends are -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
