ip_route_input in arp_rcv

[Vinolin]

Hello all,

While i'm going through the arp.c code, 
found a checking "ip_route_input".
We can find out the address type whether it is "RTN_LOCAL" etc. by calling 
inet_addr_type itself. Why we need ip_route_input here.

Please clear my doubt.

Thanks in advance,
Vinolin.