[erlang-questions] Broken ipv6 behavior?
Matthew Dempsky
matthew@REDACTED
Wed Apr 9 09:52:40 CEST 2008
On Wed, Apr 9, 2008 at 12:27 AM, Raimo Niskanen
<raimo+erlang-questions@REDACTED> wrote:
> Give us the result of:
> $ uname -a
> $ cat /etc/resolv.conf
> $ erl
> 1> inet_gethost_native:control({debug_level,4}).
> 2> inet_gethost_native:gethostbyname("ipv6.google.com", inet6).
> 3> ets:tab2list(inet_db).
> 4> ets:tab2list(inet_hosts).
I'm away from the office right now so I can't test from my OS X
laptop, but below is the output from an OpenBSD machine and a Linux
machine there that both demonstrate the same misbehavior. (If
necessary, I'll rerun the test tomorrow on OS X.)
matthew@REDACTED:~$ uname -a
OpenBSD golem.mochimedia.net 4.3 GENERIC.MP#1559 amd64
matthew@REDACTED:~$ cat /etc/resolv.conf
search mochimedia.net
nameserver 127.0.0.1
matthew@REDACTED:~$ ping6 -c 1 ipv6.google.com
PING6(56=40+8+8 bytes) 2001:470:1f04:330::2 --> 2001:4860:0:1001::68
16 bytes from 2001:4860:0:1001::68, icmp_seq=0 hlim=57 time=174.165 ms
--- ipv6.l.google.com ping6 statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 174.165/174.165/174.165/0.000 ms
matthew@REDACTED:~$ echo '{inet6, true}.' > inetrc
matthew@REDACTED:~$ erl -kernel inetrc '"./inetrc"'
Erlang (BEAM) emulator version 5.6.1 [source] [64-bit]
[async-threads:0] [kernel-poll:false]
Eshell V5.6.1 (abort with ^G)
1> inet_gethost_native:control({debug_level,4}).
inet_gethost[29369] (DEBUG):debug_level = 4
ok
2> inet_gethost_native:gethostbyname("ipv6.google.com", inet6).
inet_gethost[29369] (DEBUG):Saved domainname .google.com.
inet_gethost[29369] (DEBUG):Created worker[6118] with fd 3
inet_gethost[29369] (DEBUG):Saved domainname .google.com.
inet_gethost[6118] (DEBUG):Worker got request, op = 1, proto = 2, data
= ipv6.google.com.
{error,enotsup}
3> ets:tab2list(inet_db).
[{socks5_noproxy,[]},
{res_recurse,1},
{res_id,0},
{hostname,"golem"},
{res_alt_ns,[]},
{cache_refresh_interval,3600000},
{res_inet6,true},
{socks5_port,1080},
{socks5_methods,[none]},
{res_timeout,2000},
{cache_size,100},
{res_domain,"mochimedia.net"},
{res_retry,3},
{res_ns,[]},
{res_lookup,[native]},
{sctp_module,inet_sctp},
{udp_module,inet_udp},
{tcp_module,inet_tcp},
{socks5_server,[]},
{res_search,["mochimedia.net"]},
{res_usevc,false}]
4> ets:tab2list(inet_hosts).
[]
matthew@REDACTED:~$ uname -a
Linux lol 2.6.20-16-generic #2 SMP Tue Feb 12 02:11:24 UTC 2008 x86_64 GNU/Linux
matthew@REDACTED:~$ cat /etc/resolv.conf
search mochimedia.net
nameserver 10.0.1.40
matthew@REDACTED:~$ ping6 -c 1 ipv6.google.com
PING ipv6.google.com(2001:4860:0:1001::68) 56 data bytes
64 bytes from 2001:4860:0:1001::68: icmp_seq=1 ttl=56 time=174 ms
--- ipv6.google.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 174.967/174.967/174.967/0.000 ms
matthew@REDACTED:~$ echo '{inet6, true}.' > inetrc
matthew@REDACTED:~$ erl -kernel inetrc '"./inetrc"'
Erlang (BEAM) emulator version 5.6.1 [source] [64-bit] [smp:4]
[async-threads:0] [hipe] [kernel-poll:false]
Eshell V5.6.1 (abort with ^G)
1> inet_gethost_native:control({debug_level,4}).
inet_gethost[8266] (DEBUG):debug_level = 4
ok
2> inet_gethost_native:gethostbyname("ipv6.google.com", inet6).
inet_gethost[8266] (DEBUG):Saved domainname .google.com.
inet_gethost[8266] (DEBUG):Created worker[8268] with fd 3
inet_gethost[8266] (DEBUG):Saved domainname .google.com.
inet_gethost[8268] (DEBUG):Worker got request, op = 1, proto = 2, data
= ipv6.google.com.
{error,enotsup}
3> ets:tab2list(inet_db).
[{socks5_noproxy,[]},
{res_recurse,1},
{res_id,0},
{hostname,"lol"},
{res_alt_ns,[]},
{cache_refresh_interval,3600000},
{res_inet6,true},
{socks5_port,1080},
{socks5_methods,[none]},
{res_timeout,2000},
{cache_size,100},
{res_domain,"mochimedia.net"},
{res_retry,3},
{res_ns,[]},
{res_lookup,[native]},
{sctp_module,inet_sctp},
{udp_module,inet_udp},
{tcp_module,inet_tcp},
{socks5_server,[]},
{res_search,["mochimedia.net"]},
{res_usevc,false}]
4> ets:tab2list(inet_hosts).
[]
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