On 6/13/20 12:49 AM, guodeqing wrote:
> ie.,
> $ ifconfig eth0 6.6.6.6 netmask 255.255.255.0
>
> $ ip rule add from 6.6.6.6 table 6666
without a default entry in table 6666 the lookup proceeds to the next
table - which by default is the main table.
>
> $ ip route add 9.9.9.9 via 6.6.6.6
>
> $ ping -I 6.6.6.6 9.9.9.9
> PING 9.9.9.9 (9.9.9.9) from 6.6.6.6 : 56(84) bytes of data.
>
> ^C
> --- 9.9.9.9 ping statistics ---
> 3 packets transmitted, 0 received, 100% packet loss, time 2079ms
>
> $ arp
> Address HWtype HWaddress Flags Mask Iface
> 6.6.6.6 (incomplete) eth0
>
> The arp request address is error, this problem can be reproduced easily.
>
> Fixes: 3bfd847203c6("net: Use passed in table for nexthop lookups")
> Signed-off-by: guodeqing <[email protected]>
> ---
> net/ipv4/fib_semantics.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
> index e53871e..1f75dc6 100644
> --- a/net/ipv4/fib_semantics.c
> +++ b/net/ipv4/fib_semantics.c
> @@ -1109,7 +1109,7 @@ static int fib_check_nh_v4_gw(struct net *net, struct
> fib_nh *nh, u32 table,
> if (fl4.flowi4_scope < RT_SCOPE_LINK)
> fl4.flowi4_scope = RT_SCOPE_LINK;
>
> - if (table)
> + if (table && table != RT_TABLE_MAIN)
> tbl = fib_get_table(net, table);
>
> if (tbl)
>
how does gateway validation when the route is installed affect arp
resolution?
you are missing something in explaining the problem you are seeing.
