IPV6_RECVPKTINFO not working for IPv4-mapped addresses on Linux?

Francis Dupont Francis.Dupont at fdupont.fr
Thu Jan 23 01:03:36 CET 2014

 In your previous mail you wrote:

>  On 22/01/2014 16:54, Francis Dupont wrote:
>  >  - there is no standard/portable way to do this without the one
>  >   socket per address in IPv4 (if you need an argument, just ask what
>  >   this discussion is about :-)
>  i thought recvfrom() fixed this issue?  Forgive me if I'm wrong here - it's
>  been far too long since I've done any socket related stuff.

=> recvfrom() returns the peer address, i.e., the source address of
the request, when you need the local address, i.e., the destination

>  > => BIND polls from time to time interfaces to bind() to new addresses
>  > (again, there is no standard/portable way to be notified. BTW we (ISC)
>  > know this is a point which can be improved so if you know a generic
>  > simple solution...)
>  server.c:load_configuration() has:
>          interface_interval = cfg_obj_asuint32(obj) * 60;
>  which means that the granularity for interface rescanning is per-minute.
>  I'm not suggesting that per-second rescan would be a good idea, but
>  per-minute is too long for workable failover with vrrp.

=> I'd like to say VRRP needs to be fixed but here the reasonable
solution is to be notified...


Francis.Dupont at fdupont.fr

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