[PATCH] Can not send icmp netunreach packet

[Li Yewang <lyw@cn.fujitsu.com>]

Hi All

   There is a bug about icmp netunreach.
   If the kernel does not find a route for a packet, 
   it must send a icmp netunreach packet to the source host, 
   and  discard  the packet. But the  kernel  does not send 
   a icmp netunreach packet because of the  fib_lookup
   return value  of -ESRCH when a route  is not found. 

Signed-off-by: Li Yewang <lyw@cn.fujitsu.com>

diff -Nurp net/core_back/fib_rules.c net/core/fib_rules.c
--- net/core_back/fib_rules.c   2008-02-25 13:15:37.000000000 +0800
+++ net/core/fib_rules.c        2008-02-25 13:16:01.000000000 +0800
@@ -188,7 +188,7 @@ jumped:
 		}
 	}
 
-	err = -ESRCH;
+	err = -ENETUNREACH;
 out:
 	rcu_read_unlock();