ipv4: Remove route key identity dependencies in ip_rt_get_source().

Pass in the sk_buff so that we can fetch the necessary keys from
the packet header when working with input routes.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/route.h b/include/net/route.h
index 9f8070b..ba0e084 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -189,7 +189,7 @@
 extern unsigned		inet_dev_addr_type(struct net *net, const struct net_device *dev, __be32 addr);
 extern void		ip_rt_multicast_event(struct in_device *);
 extern int		ip_rt_ioctl(struct net *, unsigned int cmd, void __user *arg);
-extern void		ip_rt_get_source(u8 *src, struct rtable *rt);
+extern void		ip_rt_get_source(u8 *src, struct sk_buff *skb, struct rtable *rt);
 extern int		ip_rt_dump(struct sk_buff *skb,  struct netlink_callback *cb);
 
 struct in_ifaddr;