how to find one hop sender node in ns2 dsragent? -

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i want find out node in neighborhood sent me packet receiving in recv function in dsragent. use following packet header don't have previous address.

hdr_sr *srh = hdr_sr::access(packet); hdr_ip *iph = hdr_ip::access(packet); hdr_cmn *cmh =  hdr_cmn::access(packet);

the sending node shall modify 1 of header, otherwise telling impossible. since don't know application looks like, can't tell header appropriate modify.


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