[ns] From mac-802_11, how to access member function in wireless-phy

[jj niu]

Hi, all.
   
  From mac-802_11, I want to call node_sleep()- a function in wireless-phy. The variable netif_ or downtartget_ is used as pointer to the object of wireless-phy. But the compiler always tell me that the node_sleep() function does not exit.
   
  Why?
   
  I need your help. Any suggestion will be welcom.
   
  Vandlu

       
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