[Click] help: about ToDevice()

[静 李]

Hi 
 I have a question about element::ToDevice( )

  My want to :
1. get real  packets from net(eth0) ,
2. and pick out  ip packets ,
3. last  send the ip  packets back to the net(eth0).
 
 Here is my coniguration:
-----------
in1 :: FromDevice(eth0, PROMISC 0);
  ip_class :: Classifier(12/0800, -);  // ip pkts
   in1 -> ip_class;

  ip_class[1] -> Discard;
  ip_class[0]-> Print( --eth0--,NBYTES 200)
    -> ToDevice(eth0);
--------------

but the it does NOT work ,and it is the error message:


#./click  ../conf/local/todevice.click
#agnostic 'Print at 4 :: Print' in mixed context: push
input 0, pull output 0
Router could not be initialized!

But if I change  "ToDevice(eth0)"  to  "Discard", it
works.
and the result is:
--eth0--:   66 | 001109f5 3c130012 01b4c881 08004500
00345937 40003006 484adaf620cdac10 016f0050 81904b98
d7f37a7e 72288010 0a275d57 00000101 080a0917 e55b00c4
e4b1
...

I have no idea why this happens. Why I can't  use
"ToDevice(eth0)"  as in the configuration above ??

Thanks in advance.



		
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