Hi All,
  I am new to NS and I am running into a slight problem with 
  Here is the scenario. D joins a multicast group, that is being served 
by S. R is the router that forwards the packet to N1. When the packet 
arrives at N1, i change/append the header with extra information. Here i 
want to compute the destination IP (of D). This modified packet is then 
transmitted to D via N2. 
                                      S ---R---N1----N2 ---D
  Should i use ip-->daddr() as function to retreive ip address or some 
other built-in function? OR any function to get the group address? Any 
suggestions. time is of essence here.
  Thanks alot in advance.

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