res_send and Ipv6 address

[appaji arunkumar]

Hi Stean,

I am sorry, i did not know to post it to the group. I
will post it to you as well as group.

> What is m/c?  : Computer IPv6 address,

your idea seems to work good, any how I will try with
it and get back to you.

Thanking you,

Arun.





--- Stefan Puiu <stefan.puiu at gmail.com> wrote:

> Please use "reply all" when replying, since you
> posted to the list in
> the first place, and this information might be
> useful to others, too.
> 
> 
> 
> On 8/22/05, appaji arunkumar
> <arun_appaji at yahoo.co.in> wrote:
> > Hi Stefan, 
> >   
> > No, the IPv6 address is not changing frequently. I
> need to know my m/c IPv6
> > address when m/c boot up. 
> 
> What is m/c? 
> 
> >   
> > I have tried with storing  IPv6 name server list
> in the _init structure but
> > there are some bugs  need to rectify, an
> experiment is going on.., mean
> > while i have found that in the resolv.h file, the
> default file to look up
> > the name server is resolv.conf file. Is is possile
> to change that file and
> > place my file.conf to access the name server. If I
> do that, by default for
> > all name queries,  my IPv6 address name server is
> looked up?? or should I
> > store my IPv6 name server address under domain
> name to be looked up and let
> > the program access my file.conf??
> 
> Well you could compile a version of libbind that
> reads in another
> configuration file than resolv.conf, however,
> everything that links to
> it (maybe other apps of yours, if there are any
> besides the one you're
> talking about) will use that configuration, too.
> This doesn't affect
> the resolver library provided with the system and
> the apps using it,
> they will still use whatever is in /etc/resolv.conf
> 
> If you just need one app to access that nameserver,
> using a separate
> configuration file would be an idea; adding it to
> the global
> resolv.conf will make the system resolver library
> query that
> nameserver, too, which you might not want. You would
> just have a
> myresolv.conf or something like that with
> 'nameserver aaaa:bbbb:...',
> where aaaa:bbbb:... etc. is the IPv6 address of the
> nameserver. I
> haven't tried that to see if it works (I've only
> worked with libbind
> over IPv4) , but I suppose it should.
> 
> If you've found some bugs in the libbind code which
> seem easy to fix,
> you can submit a patch, but IIRC that code is dead
> now. I think only
> security fixes are being applied, nothing else.
> 
> > 
> > Stefan Puiu <stefan.puiu at gmail.com> wrote: 
> > Not looking at the libbind code (which I haven't
> used in at least
> > months), I think you are correct - you need to
> modify the res_state to
> > add this IP(v6) address to the ns address list.
> IIRC, the IPv6
> > addresses were stored in the ext part indeed, but
> I can't tell you for
> > sure; I guess you should experiment with it, and
> also set RES_DEBUG in
> > the resolver options, that should show you quite
> clearly what
> > nameserver is being queried, what happens, etc.
> > 
> > OTOH, why don't you add the IP address to
> resolv.conf? Is it changing
> > on a regular basis?
> > 
> > On 8/19/05, appaji arunkumar wrote:
> > > Hi stefan, 
> > > 
> > > Thanx for your kind reply. 
> > > 
> > > Actually when we call res_init(), it reads the
> address from the resol.conf
> > > file. and res_send() senda name lookup query to
> the name servers listed in
> > > the resol.conf file. 
> > > 
> > > but I have a situation like , I am given
> directly with IPv6 address of
> > name
> > > server to be contacted without reading
> resolv.conf to get IPv6 address for
> > > the given domain name. Is it possible to use
> res_send() to send query to
> > > given IPv6 address name server?? by appending
> given IPV6 address to _init
> > > structure?? 
> > > 
> > > kindly advice me. 
> > > 
> > > thanking you, 
> > > 
> > > arun.
> > > 
> > > Stefan Puiu wrote: 
> > > I fail to understand what you want to do. If you
> want to fetch the
> > > IPv6 address for a domain name, you just need to
> do an AAAA query
> > > instead of A. The ext part in the resolver
> state, IIRC, is used to
> > > store IPv6 addresses of nameservers, but you
> shouldn't worry about
> > > that; the nsaddr[] vector is read in from
> /etc/resolve.conf, see
> > > lib/resolv/res_init.c in the BIND 8 source, or
> look for the res_init()
> > > function (I can't seem to remember the name of
> the actual function it
> > > calls to do the work, was it res_vinit?).
> > > 
> > > On 8/16/05, appaji arunkumar wrote:
> > > > 
> > > > Hi I am a Navie user to DNS.
> > > > 
> > > > I would like to know, does BIND8 queries such
> as
> > > > res_send(), used if the underlying socket is
> IPv6.
> > > > and we are intresed to retrive the IPv6
> address from
> > > > the name server. Given an IPv6 address of name
> server
> > > > X , is it possible that we can get IPv6
> address for
> > > > the given domain name by adding address to
> > > > _res.EXT.ext->nsaddr[].sin, please suggest me
> am i
> > > > going in a right track??
> > > > 
> > > > Thanx in advance,
> > > > Arun.
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > >
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