* [Q] ipv6: RTM_GETROUTE interpretation of RTA_IIF
@ 2012-03-29 13:03 Shmulik Ladkani
2012-04-01 6:18 ` ipv6: RTM_GETROUTE inconsistent " Shmulik Ladkani
0 siblings, 1 reply; 4+ messages in thread
From: Shmulik Ladkani @ 2012-03-29 13:03 UTC (permalink / raw)
To: netdev
Hi,
In IPv4, if the RTA_IIF attribute is specified in an RTM_GETROUTE
message, then a route is searched as if a packet was received on the
specified iif interface - i.e. 'inet_rtm_getroute()' calls
'ip_route_input()'.
However in IPv6, RTA_IIF is not interpreted in the same way:
'inet6_rtm_getroute()' always calls 'ip6_route_output()', regardless the
RTA_IIF attribute.
As a result, in IPv6 there's no way to use RTM_GETROUTE in order to look
for a route as if a packet was received on a specific interface.
I'd like to modify 'inet6_rtm_getroute()' so that RTA_IIF is interpreted
in the same way as in IPv4's 'inet_rtm_getroute()'.
Before I come up with a patch, I'd like to know whether current
interpretation of RTA_IIF in 'inet6_rtm_getroute()' is deliberate.
Regards,
Shmulik
^ permalink raw reply [flat|nested] 4+ messages in thread
* ipv6: RTM_GETROUTE inconsistent interpretation of RTA_IIF
2012-03-29 13:03 [Q] ipv6: RTM_GETROUTE interpretation of RTA_IIF Shmulik Ladkani
@ 2012-04-01 6:18 ` Shmulik Ladkani
2012-04-01 7:03 ` Eric Dumazet
0 siblings, 1 reply; 4+ messages in thread
From: Shmulik Ladkani @ 2012-04-01 6:18 UTC (permalink / raw)
To: netdev, davem; +Cc: kuznet, jmorris, yoshfuji, kaber
(Bump)
Any reason not to submit a patch that fixes the below issue?
Regards,
Shmulik
On Thu, 29 Mar 2012 15:03:11 +0200 Shmulik Ladkani <shmulik.ladkani@gmail.com> wrote:
> Hi,
>
> In IPv4, if the RTA_IIF attribute is specified in an RTM_GETROUTE
> message, then a route is searched as if a packet was received on the
> specified iif interface - i.e. 'inet_rtm_getroute()' calls
> 'ip_route_input()'.
>
> However in IPv6, RTA_IIF is not interpreted in the same way:
> 'inet6_rtm_getroute()' always calls 'ip6_route_output()', regardless the
> RTA_IIF attribute.
>
> As a result, in IPv6 there's no way to use RTM_GETROUTE in order to look
> for a route as if a packet was received on a specific interface.
>
> I'd like to modify 'inet6_rtm_getroute()' so that RTA_IIF is interpreted
> in the same way as in IPv4's 'inet_rtm_getroute()'.
>
> Before I come up with a patch, I'd like to know whether current
> interpretation of RTA_IIF in 'inet6_rtm_getroute()' is deliberate.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ipv6: RTM_GETROUTE inconsistent interpretation of RTA_IIF
2012-04-01 6:18 ` ipv6: RTM_GETROUTE inconsistent " Shmulik Ladkani
@ 2012-04-01 7:03 ` Eric Dumazet
2012-04-01 7:28 ` Shmulik Ladkani
0 siblings, 1 reply; 4+ messages in thread
From: Eric Dumazet @ 2012-04-01 7:03 UTC (permalink / raw)
To: Shmulik Ladkani; +Cc: netdev, davem, kuznet, jmorris, yoshfuji, kaber
On Sun, 2012-04-01 at 09:18 +0300, Shmulik Ladkani wrote:
> (Bump)
>
> Any reason not to submit a patch that fixes the below issue?
Hi Shmulik
No reason I can think about. Are you planning to provide this yourself ?
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ipv6: RTM_GETROUTE inconsistent interpretation of RTA_IIF
2012-04-01 7:03 ` Eric Dumazet
@ 2012-04-01 7:28 ` Shmulik Ladkani
0 siblings, 0 replies; 4+ messages in thread
From: Shmulik Ladkani @ 2012-04-01 7:28 UTC (permalink / raw)
To: Eric Dumazet; +Cc: netdev, davem, kuznet, jmorris, yoshfuji, kaber
On Sun, 01 Apr 2012 09:03:59 +0200 Eric Dumazet <eric.dumazet@gmail.com> wrote:
> On Sun, 2012-04-01 at 09:18 +0300, Shmulik Ladkani wrote:
> > (Bump)
> >
> > Any reason not to submit a patch that fixes the below issue?
>
> Hi Shmulik
>
> No reason I can think about. Are you planning to provide this yourself ?
Yes.
Just wanted to make sure ipv6's RTA_IIF interpretation is not deliberate.
Regards,
Shmulik
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-04-01 7:29 UTC | newest]
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2012-03-29 13:03 [Q] ipv6: RTM_GETROUTE interpretation of RTA_IIF Shmulik Ladkani
2012-04-01 6:18 ` ipv6: RTM_GETROUTE inconsistent " Shmulik Ladkani
2012-04-01 7:03 ` Eric Dumazet
2012-04-01 7:28 ` Shmulik Ladkani
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