On Thu, Aug 01, 2019 at 01:51:25PM -0600, David Ahern wrote: > On 8/1/19 2:29 AM, Hangbin Liu wrote: > > Jianlin reported a bug that for IPv4, ip route get from src_addr would fail > > if src_addr is not an address on local system. > > > > \# ip route get 1.1.1.1 from 2.2.2.2 > > RTNETLINK answers: Invalid argument > > so this is a forwarding lookup in which case iif should be set. Based on
with out setting iif in userspace, the kernel set iif to lo by default. > the above 'route get' inet_rtm_getroute is doing a lookup as if it is > locally generated traffic. yeah... but what about the IPv6 part. That cause a different behavior in userspace. Thanks Hangbin
