Re: [Autoconf] what's a router

Alexandru Petrescu <alexandru.petrescu@gmail.com> Thu, 05 August 2010 11:17 UTC

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Date: Thu, 05 Aug 2010 13:17:56 +0200
From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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To: Henning Rogge <henning.rogge@fkie.fraunhofer.de>
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Subject: Re: [Autoconf] what's a router
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Le 05/08/2010 12:25, Henning Rogge a écrit :
> On Thu August 5 2010 11:59:54 Alexandru Petrescu wrote:
>>> That make no sense for a MANET, most MANET routers have only a
>>> single interface.
>>
>> Well, are MANET routers 'routers' at all?
>
> Yes.
>
>> Does a MANET router execute the longest-prefix match algorithm?
>
> Most MANET routers I'm working with are linux systems... mostly on
> embedded hardware. So the answer is "yes" for the systems I know.
>
>
>> Does a MANET router select an output interface depending on the
>> result of that agorithm?  Or is it just doing it with always the
>> same result?
>
> Yes... difficult choice between the localhost interface and the only
>  physical outgoing interface wlan0.

So a MANET Router actually has at least two interfaces, which makes it 
more of a router indeed, in my reading.

>>> And you don't need any header files like route.h on a router,
>>> just on your development system. I don't think you will find
>>> many embedded routers (DSL, MANET, ...) with header files on
>>> them.
>>
>> WEll... the /usr/include stuff is there everywhere in the deployed
>> routers running binaries.  E.g. linux phones.  I think a device
>> that boots a kernel has a file system and that should have a
>> /usr/include.
>
> Maybe you should check your facts before you post stuff like this.
>
> I just opened the console of my android smartphone (linux based !)
> and I was not surprised that there are no include files on the
> device.

Good to know, I haven't tried android linux.

> Include files are necessary to COMPILE code... not to run it. They

Compile with static or dynamic link edition?

> are a waste of space on embedded linux systems, because you don't
> have a compiler on them. Noone creating a sane distribution for an
> embedded linux system would add an include file to it.
>
> I would bet that neither a windows smartphone, nor a webos palm one,
>  nor an iphone has any include header files on it's flash. Unless the
>  user installed it afterwards.

Libraries .so, .dll, modules .ko and kernel images may need .h at run 
time...

Alex

> Henning Rogge