[ns] How can I get nonwireless id in classifier.cc

[Nirex]

Hello,

I want to create simulation of network with using cisco routers with their
access lists. I decided that particular access list of routers I would store
to particular node. If I understand working of NS correctly I can catch
incoming packet for some node in:

classifier.cc in
void Classifier::recv(Packet* p, Handler*h)

Incoming packet has header. There is prev_hop (it could be actual node) in
packet header.

hdr_cmn *cmnh;
cmnh = hdr_cmn::access(p);
prev_hop = cmnh->prev_hop();

Bui If I use it it still return 0

Please, could you help me? Or could you tell me another way, how I can get
id of actual nonwireles node.

Thanx a lot

Jiri Macku