Re: [ns] another implementation question for ad hocs

[Piyush Khengar <piyush.khengar@kcl.ac.uk>]

Thanks Anders,

I had already added that into the code. I thought that maybe the
format_aodv() function was to do with the receiving node. Yeah, I know,
stupid...

You see, when I simulate the protocol as two explicitly created agents
on a wired link, each ad hoc agent is able to receive packets
(myprotocol specific, like HELLO packets for example) from the other
with no problems. However, when simulating in a wireless environment
using node-config, transmitted packets (again, I'm only interested in
myprotocol specific ones) are not received by the other side, thereby
rendering the protocol useless.

What do I need to do to enable the other side to receive these packets.
It's probably something really obvious...

Thanks again,
Piyush



Anders Lindgren wrote:
> 
> Hi,
> 
> If your packets will be of some new packet type (i.e. ch->ptype() that is
> "switched" on is something else than what is already there), you will need
> to do that, or at least you will need to add a part saying
> 
> case PT_NEWP:
>         break;
> 
> where PT_NEWP is the new packet type. The reason for having this
> format_xyz() function is if you want any protocol specific data in the
> trace file (the format_xyz() function writes stuff to the trace
> file). Otherwise I suppose just the above would do (but you need that
> case PT_NEWP: stuff, otherwise an error will occur (unknown packet type)).
> 
> Hope this helps,
> 
> /Anders
> 
> On Fri, 30 Mar 2001, Piyush Khengar wrote:
> > I have noticed that in the file cmu-trace.cc, there is a switch
> > statement (in CMUTrace::format() ) that detects the packet types and
> > then calls another function accordingly.
> >
> > E.g. case PT_AODV:
> >               format_aodv(p, offset);
> >               break;
> >
> > What is the format_aodv/tora/dsr() function used for? I've had a look at
> > the code for this function and am not sure of it's significance. Do I
> > need to include a format_myagent() function for my protocol?
> >
> > Many thanks,
> > Piyush
> > (ns-2.1b7, red hat 7)
> >