From fee9dee730a40f671c1972a324ed54f0d68523e1 Mon Sep 17 00:00:00 2001
From: Vlad Yasevich <vladislav.yasevich@hp.com>
Date: Thu, 25 Oct 2007 18:54:46 -0700
Subject: [UDP]: Make use of inet_iif() when doing socket lookups.

UDP currently uses skb->dev->ifindex which may provide the wrong
information when the socket bound to a specific interface.
This patch makes inet_iif() accessible to UDP and makes UDP use it.

The scenario we are trying to fix is when a client is running on
the same system and the server and both client and server bind to
a non-loopback device.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Acked-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/inet_sock.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'include/net/inet_sock.h')

diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 62daf214931f..70013c5f4e59 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -24,6 +24,7 @@
 #include <net/flow.h>
 #include <net/sock.h>
 #include <net/request_sock.h>
+#include <net/route.h>
 
 /** struct ip_options - IP Options
  *
@@ -190,4 +191,10 @@ static inline int inet_sk_ehashfn(const struct sock *sk)
 	return inet_ehashfn(laddr, lport, faddr, fport);
 }
 
+
+static inline int inet_iif(const struct sk_buff *skb)
+{
+	return ((struct rtable *)skb->dst)->rt_iif;
+}
+
 #endif	/* _INET_SOCK_H */
-- 
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