commit f8126f1d5136be1ca1a3536d43ad7a710b5620f8
author David S. Miller <davem@davemloft.net> Fri Jul 13 05:03:45 2012 -0700
committer David S. Miller <davem@davemloft.net> Fri Jul 20 13:31:20 2012 -0700
tree 8a92815052257c4ca29461f5b9ddaaeac288a7ed
parent f1ce3062c53809d862d8a04e7a0566c3cc4e0bda

ipv4: Adjust semantics of rt->rt_gateway.

In order to allow prefixed routes, we have to adjust how rt_gateway
is set and interpreted.

The new interpretation is:

1) rt_gateway == 0, destination is on-link, nexthop is iph->daddr

2) rt_gateway != 0, destination requires a nexthop gateway

Abstract the fetching of the proper nexthop value using a new
inline helper, rt_nexthop(), as suggested by Joe Perches.

Signed-off-by: David S. Miller <davem@davemloft.net>
Tested-by: Vijay Subramanian <subramanian.vijay@gmail.com>