Re: [ns] Info about Classifier Architecture (fwd)

["V.R.Sundar" <vsundar@usc.edu>]

Hi,

On Thu, 5 Jul 2001, Sunil Gowda wrote:

> Hi,
>     Can anyone please let me know when and how the "slot_" array in the
> address classifier is initialized?

Here is what i understand so far ( somebody correct me if i am wrong). the
slot_ array is indexed by the dest addr and points to the object this
classifier should hand the packet to for the given dest address. To do
this the method install is called which in turn allocs slot_ if needed. To
give an idea of how it works ( with static routing and flat-heirarchy):

(1) simulator::run(tcl code) calls..
(2) routelogic::configure(tcl) calls..
(3) agent/rtproto/static::init-all (tcl)
(4) simulator::compute-routes(tcl)
(5) simulator::compute-flat-routes(tcl) which does:
(5-a) routelogic::compute ( this i think is C code ) - maps to
compute-routes in c code.Finds the next hop for all dests.
(5-b) simulator::populate-flat-.. (c code i think, again without the
cmd.).For each dest uses the nexthop previously found to find the link to
use and then calls
(6) node::add_route which calls
(7) routingmodule::add_route for every routing module installed in the
linked list each of which installs the dst/link-object in its own
classifier.

there is a chapter in the manual on classifiers which gives an idea of how
classifiers work. 

sundar

-- 
V.R.Sundar
Ph: 323-734-1920