• David Ahern's avatar
    ipv4: Return error for RTA_VIA attribute · b6e9e5df
    David Ahern authored
    IPv4 currently does not support nexthops outside of the AF_INET family.
    Specifically, it does not handle RTA_VIA attribute. If it is passed
    in a route add request, the actual route added only uses the device
    which is clearly not what the user intended:
      $ ip ro add via inet6 2001:db8:1::1 dev eth0
      $ ip ro ls
      ... dev eth0
    Catch this and fail the route add:
      $ ip ro add via inet6 2001:db8:1::1 dev eth0
      Error: IPv4 does not support RTA_VIA attribute.
    Fixes: 03c05665 ("mpls: Netlink commands to add, remove, and dump routes")
    Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
fib_frontend.c 36.5 KB