On 29.01.2016 12:30, Paolo Abeni wrote:
The kernel has never enforced the egress interface specified
via the sticky pktinfo, except briefly between the commits
741a11d9e410 ("net: ipv6: Add RT6_LOOKUP_F_IFACE flag if oif is set")
and
d46a9d678e4c ("net: ipv6: Dont add RT6_LOOKUP_F_IFACE flag if saddr set"),
but the ping6 tools was unaffected up to iputils-20100214,
since before it used SO_BINDTODEVICE to enforce the egress
interface.
I think because of the bad situation in terms of uapi and that recently
behavior switched multiple times in kernel and iputils, enforcing the
outgoing interface seems to be the right thing to do for me.
Also it matches expected behavior by ping6. Treating the interface as
enforced is from a standards PoV the correct thing to do.
Thanks,
Hannes
