Problem after upgrading to BIND 9
rick.jones2 at hp.com
Fri Sep 1 00:42:39 UTC 2006
Mark Andrews <Mark_Andrews at isc.org> wrote:
>> Mark Andrews <Mark_Andrews at isc.org> wrote:
>> > You have fixed the symptom but not the problem. getaddrinfo(),
>> > which telnet should be using, only looks for IPv6 addresses if there
>> > is IPv6 support enabled. You will have trouble talking to all dual
>> > stack machines unless you find the real cause.
>> Do you mean the AI_ADDRCONFIG flag? Doesn't that have to be set
>> explicitly by the caller of getaddrinfo() as it is not a default?
> RFC 2553 Basic Socket Interface Extensions for IPv6 March 1999
> The special flags value of AI_DEFAULT is defined as
> #define AI_DEFAULT (AI_V4MAPPED | AI_ADDRCONFIG)
[my appologies if this dups, I received a reply both in email and to
the usenet group...]
Interesting. I find that in an HP-UX 11.11 include file, but not one
on an Ubuntu Dapper system.
I went looking at the RFC and while the thing is named AI_DEFAULT I
didn't get the impression that it was meant to be the default if one
didn't specify any flags:
The flags argument specifies the types of addresses that are searched
for, and the types of addresses that are returned. We note that a
special flags value of AI_DEFAULT (defined below) should handle most
That is, porting simple applications to use IPv6 replaces the call
hptr = gethostbyname(name);
hptr = getipnodebyname(name, AF_INET6, AI_DEFAULT, &error_num);
Which suggests it is still an explicit setting of a flag that
implicitly includes AI_ADDRCONFIG.
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these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
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