Re: IP ALERT

[Ahmed A-G Helmy <ahelmy@catarina.usc.edu>]

Arioli,

> > 1. mimic the implementation of NetworkInterface object 
> > (net-interface.cc?) to create your own ip packet marker

right... I think what you want is a clean way to intercept the packet, do 
what you want with it, and send it on its way..
this is basically what objects like interface, errormodels and ttl/trace 
objects do [check them and follow what you see is the most convenient for 
you] ... 

also, if you are anticipating a lot of change in the packet manipulation 
you may want to add a callback function and put the initial packet 
manipulation function in otcl, until it stabilizes,... 
this however may decrease the performance, since otcl code is called on 
every manipulated packet.

Regards,
-A
> 
> > 2. insert these ip packet markers like inserting loss modules into links
> > (see previous ns-user discusion about inserting losses)