Re: [ns] Eavesdropping AODV-like agent

[Satish Kumar <kkumar@isi.edu>]

defaulttarget points to the routing agent on the node. If you make 
defaulttarget point to your agent, you will need to make sure that all packets 
received by your agent are sent to the routing agent. Maybe, looking at how 
the imep object is placed in a node running tora will give you some ideas. 
Hope this helps.

Satish


> Hello,
> 
> I already posted that question this week-end but it did not stir up many
> enthusiastic reactions. Apparently the week-end is not a good period to ask
> a question, so I post it again now. If you already read it and cannot help,
> sorry for the repetition.
> 
> 
> I developped a normal agent for mobile nodes, and I would like it to receive
> all the packets the routing agent receives, and to send "hello" packets, i.e.
> packets that should be received by every node "within earing distance" of the
> node sending it. The routing agent I use is AODV.
> 
> 
> The moment when AODV is attached to its node is in ns-mobilenode.tcl, in the
> function "add-target", and the code doing it is:
> [snip]
> $agent target [$self set ll_(0)]
> [snip]
> $self install-defaulttarget $agent
> 
> #$classifier_ defaulttarget $agent
> 
> $dmux_ install $port $agent
> 
> So could I simply add there something like (nbd is my new agent)
> 
> set nbdonly  [string first  "Agent/NBD" [$agent info class]]
> if {$nbdonly != -1 } {
> 	    agent target [$self set ll_(0)]
>                 $self install-defaulttarget $agent
>                 $dmux_ install $port $agent
>          			}
> with $port being 255?
> 
> I suppose this will cause problems since, for instance, maybe the defulttarget
> points towards a unique agent, so making it point towards the nbd agent will
> cut it from the AODV agent, and I don't want that, I  really want a kind of
> fork.
> 
> What would you advise me to do?
> 
> -- 
> Robin Poss
>