ip: add loose reverse path filtering
Extend existing reverse path filter option to allow strict or loose
filtering. (See http://en.wikipedia.org/wiki/Reverse_path_filtering).
For compatibility with existing usage, the value 1 is chosen for strict mode
and 2 for loose mode.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 741e4fa..cafcc49 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -275,7 +275,7 @@
fib_res_put(&res);
if (no_addr)
goto last_resort;
- if (rpf)
+ if (rpf == 1)
goto e_inval;
fl.oif = dev->ifindex;
