• guodeqing's avatar
    net: Fix the arp error in some cases · 5eea3a63
    guodeqing authored
    ie.,
    $ ifconfig eth0 6.6.6.6 netmask 255.255.255.0
    
    $ ip rule add from 6.6.6.6 table 6666
    
    $ 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.
    
    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 is because fib_table_lookup in
    fib_check_nh lookup the destnation 9.9.9.9 nexthop, the scope of
    the fib result is RT_SCOPE_LINK,the correct scope is RT_SCOPE_HOST.
    Here I add a check of whether this is RT_TABLE_MAIN to solve this problem.
    
    Fixes: 3bfd8472 ("net: Use passed in table for nexthop lookups")
    Signed-off-by: default avatarguodeqing <geffrey.guo@huawei.com>
    Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    5eea3a63
fib_semantics.c 52.2 KB