[Olsr-users] Hop Count of data packets

[Antonio Anselmi]

or ping -R too

Antonio

On Fri, April 3, 2009 18:34, John Hay said:
> On Fri, Apr 03, 2009 at 07:25:12PM +0530, Bhat, Ishwara wrote:
>>
>> I had not considered this. Thanks for the suggestion.
>>
>> This hop count has to be done by a "mesh monitoring" work station
>> (mesh
>> nodes are embedded devices and there is a PC which monitors the mesh
>> nodes. The PC needs to be able to able to trace the path)
>
> If you do not need to know what the intermediate nodes are, you can use
> ping and parse its ttl field.
>
>>
>> I think that should work.
>>
>> Thanks,
>> Ishwar
>>
>> -----Original Message-----
>> From: L. Aaron Kaplan [mailto:(spam-protected)]
>> Sent: Friday, April 03, 2009 6:38 PM
>> To: Bhat, Ishwara
>> Cc: (spam-protected)
>> Subject: Re: [Olsr-users] Hop Count of data packets
>>
>> Maybe I misunderstood you now but what you can do is simply
>> traceroute
>> and count the number of hops your data takes.
>> What would be wrong with that idea? Did you already consider it?
>>
>> best,
>> a.
>>
>> On Apr 3, 2009, at 1:46 PM, Bhat, Ishwara wrote:
>>
>> > Hi,
>> >
>> > I need to know how many hops a data has traversed over mesh. I know
>> > OLSR control packets have hop count field. But what about data
>> > packets routed on mesh?
>> >
>> > I thought I could modify any data packet in the forwarding node (so
>> > as to update the hop count). But application level does not have
>> > access to packets destined for some other node.
>> >
>> > Should this be done only by iptables and netfilter chains ? Or is
>> > there any other way to do this?
>> >
>> > Thanks,
>> > Ishwar
>> >
>
> John
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> John Hay -- (spam-protected) / (spam-protected)
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