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

Michael Santos <>
Fri May 3 19:50:53 CEST 2013


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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