[erlang-patches] [PATCH] epmd: support IPv6 node registration

Fredrik Gustafsson <>
Fri May 3 20:06:18 CEST 2013


I'll fetch on monday. 
Thanks,

Sent from my iPhone

On 3 maj 2013, at 19:50, Michael Santos <> wrote:

> On Fri, May 03, 2013 at 04:36:08PM +0200, Fredrik wrote:
>> On 05/03/2013 04:32 PM, Michael Santos wrote:
>>> On Fri, May 03, 2013 at 04:04:13PM +0200, Fredrik wrote:
>>>> On 05/03/2013 03:44 PM, Fredrik wrote:
>>>>> On 05/03/2013 03:27 PM, Michael Santos wrote:
>>>>>> On Wed, Feb 20, 2013 at 07:55:17AM -0500, Michael Santos wrote:
>>>>>>> Allow IPv6 nodes to register with and query epmd. On systems with
>>>>>>> IPv6 support:
>>>>>>> 
>>>>>>> * epmd listens on both the IPv4 and IPv6 ANY or loopback sockets
>>>>>>> 
>>>>>>> * the epmd cli client connects to epmd over the IPv6 loopback
>>>>>>> 
>>>>>>> * distributed nodes started with "-proto_dist inet6_tcp" will register
>>>>>>>  with epmd over IPv6
>>>>>>> 
>>>>>>> The interaction between IPv4 and IPv6 sockets depends on the platform:
>>>>>>> 
>>>>>>> * FreeBSD allows multiple "specific" sockets to bind the same
>>>>>>> port (such
>>>>>>>  as 2 sockets listening to the same port on ANY and the loopback).
>>>>>>>  Binding port 4369 to IPv4 and IPv6 sockets simulataneously
>>>>>>> is allowed.
>>>>>>> 
>>>>>>> * Linux does not allow the same port to be bound by different sockets.
>>>>>>>  Setting the IPV6_V6ONLY socket option is required.
>>>>>>> 
>>>>>>> * Windows
>>>>>>> 
>>>>>>>  The behaviour differs depending on the version of Windows:
>>>>>>> 
>>>>>>> http://msdn.microsoft.com/en-us/library/windows/desktop/bb513665(v=vs.85).aspx
>>>>>>> 
>>>>>>>  According to the site, sockets on Windows XP with Service
>>>>>>> Pack 1 (SP1)
>>>>>>>  and Windows Server 2003 will only listen on either IPv4 or IPv6, so
>>>>>>>  creating two sockets is required to service IPv4 and IPv6 traffic on
>>>>>>>  the same port. The IPV6_V6ONLY socket option is not supported.
>>>>>>> 
>>>>>>>  For Windows Vista and later, a single socket can handle
>>>>>>> IPv4 and IPv6
>>>>>>>  traffic for the same port. The IPV6_V6ONLY socket option is
>>>>>>> supported
>>>>>>>  and is enabled for IPv6 sockets by default.
>>>>>>> ---
>>>>>>> erts/doc/src/epmd.xml             |    2 +-
>>>>>>> erts/doc/src/erl.xml              |   22 +++++
>>>>>>> erts/epmd/src/epmd.c              |    6 +-
>>>>>>> erts/epmd/src/epmd_cli.c          |   11 ++-
>>>>>>> erts/epmd/src/epmd_int.h          |   63 +++++++++----
>>>>>>> erts/epmd/src/epmd_srv.c          |  184
>>>>>>> +++++++++++++++++++++++++------------
>>>>>>> erts/epmd/test/epmd_SUITE.erl     |   33 ++++++-
>>>>>>> lib/kernel/src/erl_epmd.erl       |   18 ++--
>>>>>>> lib/kernel/src/inet6_tcp_dist.erl |    2 +-
>>>>>>> 9 files changed, 248 insertions(+), 93 deletions(-)
>>>>>> ping!
>>>>>> _______________________________________________
>>>>>> erlang-patches mailing list
>>>>>> 
>>>>>> http://erlang.org/mailman/listinfo/erlang-patches
>>>>> I thought that I've already mailed you back regarding this patch.
>>>>> But now I don't seem to remember what I wanted you to do about it.
>>>>> I will run it in 'pu' builds over the weekend. If it turns out OK
>>>>> it will be reviewed.
>>>> Ok,
>>>> Found out what I was suppose to mail you about:
>>>> It does not build on windows;
>>>> 
>>>> epmd_srv.o : error LNK2019: unresolved external symbol IN6_ARE_ADDR_EQUAL referenced in function conn_local_peer_check
>>>> epmd_srv.o : error LNK2019: unresolved external symbol IN6_IS_ADDR_LOOPBACK referenced in function conn_local_peer_check
>>>> ****/bin/win32/epmd.exe : fatal error LNK1120: 2 unresolved externals
>>> I *think* the last version of the patch fixes the link error on Windows
>>> (haven't tested it). It sets the Windows version as suggested by Patrik
>>> Nyblom.
>>> 
>>> Sorry for the confusion. I can re-send the patch or I can post it to
>>> github.
>> Please post it on github! :)
> 
> Done!
> 
> git fetch git://github.com/msantos/otp.git epmd-IPv6-node-reg
> 
> https://github.com/msantos/otp/compare/erlang:maint...epmd-IPv6-node-reg
> https://github.com/msantos/otp/compare/erlang:maint...epmd-IPv6-node-reg.patch
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> erlang-patches mailing list
> 
> http://erlang.org/mailman/listinfo/erlang-patches


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