[ns] doubt in maodv,its very simple

[mahi kapoor]

hi everyone
  i m trying to understand maodv code completely.could u tell me whats the 
difference b/w
  drop(p,DROP_RTR_ROUTE_LOOP) and Packet::free(p)
  is it drop is dropping the pkts by telling reason but free doing same thing 
without telling any reason?
  whats the meaning of if(ih->daddr() <IP_MULTICAST)
  i know ih->daddr() is destination address but not getting the mean of this 
particular condition.
  please make it clear
  regards 
  mahi

                                
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