netdev - Re: [PATCH net-next] net: Fix vti use case with oif in dst lookups for IPv6

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Date:	Tue, 20 Oct 2015 11:48:48 -0600
From:	David Ahern <dsa@...ulusnetworks.com>
To:	Hajime Tazaki <thehajime@...il.com>
Cc:	steffen.klassert@...unet.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: Fix vti use case with oif in dst lookups
 for IPv6

On 10/20/15 6:31 AM, Hajime Tazaki wrote:
> yes, this sendmsg uses non-zero flowi6_oif.
>
>
> the conditions are
>
> - sendmsg () with INET6/RAW socket (with IPPROTO_MH)
> - ip6_pktinfo.ipi6_addr (fl6.saddr) and ipi6_oif
>    (fl6.flowi6_oif) are non-NULL.
> => ipi6_addr (fl6.saddr) is not the IP address of oif, but
>      another interfaces (home address of mip6)

interesting. so forcing a send out of interface X but using the source 
address of interface Y.

Does the attached patch work for you?

View attachment "ipv6-oif-with-saddr.patch" of type "text/plain" (849 bytes)