Hi,
* Konstantin Khomoutov <flatw...@users.sourceforge.net> [2009-07-30
21:40:51+0400]:
>
> A quick followup to my previous post.
>
> First, it's not needed to mess with ejabberd to see what Erlang resolver
> configuration it sees -- it suffices to start the standalone Erlang shell
> with the right parameters.
>
> Second, this post [1] suggests to tweak the Erlang resolver config --
> worth trying out.
>
> How to do this.
>
> [snipped]
>
This is what I ran:
----
a...@chipmunk:~$ cat /tmp/run
inet:get_rc().
inet_res:getbyname("_xmpp-server._tcp.gmail.com", srv).
----
It seems that "nameserver ::1" does not work at all, probably an erlang
bug instead?
-- nameserver 127.0.0.1 + !inet6 --
a...@chipmunk:~$ erl -kernel inetrc '"/tmp/inetrc"' < /tmp/run
Eshell V5.6.3 (abort with ^G)
1> [{domain,"wormnet.eu"},
{nameserver,{127,0,0,1}},
{search,["wormnet.eu"]},
{lookup,[native]}]
2> {ok,{hostent,"_xmpp-server._tcp.gmail.com",[],srv,5,
[{20,0,5269,"xmpp-server2.l.google.com"},
{20,0,5269,"xmpp-server3.l.google.com"},
{20,0,5269,"xmpp-server1.l.google.com"},
{5,0,5269,"xmpp-server.l.google.com"},
{20,0,5269,"xmpp-server4.l.google.com"}]}}
3> *** Terminating erlang (non...@nohost)
----------------------------------
-- nameserver ::1 + !inet6 --
a...@chipmunk:~$ erl -kernel inetrc '"/tmp/inetrc"' < /tmp/run
Eshell V5.6.3 (abort with ^G)
1> [{domain,"wormnet.eu"},
{search,["wormnet.eu"]},
{lookup,[native]}]
2> {error,timeout}
3> *** Terminating erlang (non...@nohost)
----------------------------------
-- nameserver 127.0.0.1 + inet6 --
a...@chipmunk:~$ erl -kernel inetrc '"/tmp/inetrc"' < /tmp/run
Eshell V5.6.3 (abort with ^G)
1> [{domain,"wormnet.eu"},
{nameserver,{127,0,0,1}},
{search,["wormnet.eu"]},
{inet6,true},
{lookup,[native]}]
2> {ok,{hostent,"_xmpp-server._tcp.gmail.com",[],srv,5,
[{20,0,5269,"xmpp-server4.l.google.com"},
{20,0,5269,"xmpp-server1.l.google.com"},
{20,0,5269,"xmpp-server2.l.google.com"},
{5,0,5269,"xmpp-server.l.google.com"},
{20,0,5269,"xmpp-server3.l.google.com"}]}}
3> *** Terminating erlang (non...@nohost)
----------------------------------
-- nameserver ::1 + inet6 --
a...@chipmunk:~$ erl -kernel inetrc '"/tmp/inetrc"' < /tmp/run
Eshell V5.6.3 (abort with ^G)
1> [{domain,"wormnet.eu"},
{search,["wormnet.eu"]},
{inet6,true},
{lookup,[native]}]
2> {error,timeout}
3> *** Terminating erlang (non...@nohost)
----------------------------------
In the next posting[1] in the 'inet6' thread I see:
----
inet_db:add_ns({A,B,C,D}). %% Name server must be IPv4, there is a fixme in
inet_db.
----
Looking at inet_db.erl I see "Fix IPv6 nameservers" all over the place,
so it's a bug in upstream erlang it seems?
It is interesting that an A record lookup is made by ejabberd though in
this situation, is there some fallback code being involked? Should it
be?
Cheers
[1] http://erlang.org/pipermail/erlang-questions/2008-April/034254.html
--
Alexander Clouter
.sigmonster says: Tuesday is the Wednesday of the rest of your life.
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