[LARTC] Compiling sch_tbf.c in user space

[Catalin(ux aka Dino) BOIE]

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> I have already looked at netem and am using that for
> modelling parameters like delay, jitter etc.
> But the situation for bandwidth modelling is not there
> in netem.The reason im doin it in user space is that i
> need to route all packets coming into the system
> through a single tbf.Using the kernel and tc system
> the tbf is attached to a particular interface and
> hence i do not have a common tbf for all interfaces.I
> want a common tbf to shape all the traffic before
> sending the packets out on the respective interfaces.I
> have just come across the idea of using IMQ devices
> for this task.I believ it is possible for the packets
> coming in from different interfaces to be passed thro
> a common tbf attached to an IMQ before sending them
> out on the final interfaces.Im just not sure if the
> packets routed to thro to the imq are again routed to
> the correct interface finally.Do u have any idea on
> this one.I would greatly appreciate any help on this.
> thanx in advance

You can take a look at Jamal's actions, especialy redirect.
I didn't use IMQ, sorry.

http://lwn.net/Articles/121407/

>>
>>> idea we came up with was to route packets from
>>> different hosts to user space using Netfilter and
>> then
>>> send them through a common tbf implemented in user
>>> space in order to model a simple bandwidth shaping
>>> scenario.
>>> Routing packets to user space has been easy using
>> the
>>> Netfitler hooks and libipq.
>>> My problem now is that i need to implement a tbf
>> in
>>> user space.I was thinking if its possible to
>> modify
>>> the sch_tbf.c code to make it work in user space
>> so
>>> that i can compile it as part of my user space
>> program
>>> that handles the packets sent to user space thro
>>> netfilter.Ive tried modifying this code a bit but
>> it
>>> gives me a huge number of errors when i try to
>> compile
>>> it as a simple C program in user space.
>>> If this is not possible does any one have a simple
>>> basic implementation of the token bucket filter
>> that i
>>> can use in my program to test this scenario or any
>>> other ideas on how to implement this tbf in user
>>> space.
>>> Thanx a million in advance.......and im sorry i
>> didnt
>>> know exactly where to post the query so thats why
>> i
>>> posted to both lists.
>>> thanx and kind regards
>>> vinay
>>>
>>>
>>>
>>>
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>>
>> ---
>> Catalin(ux aka Dino) BOIE
>> catab at deuroconsult.ro
>> http://kernel.umbrella.ro/
>>
>
>
> =====
> Vinay Mathew
> Technische Universität - Braunschweig,
> Zimmer 41215, Rebenring 64, 38106 Braunschweig,
> Deutschland.
> Ph No:+4917622086705
>
>
>
>
>
>
>
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---
Catalin(ux aka Dino) BOIE
catab at deuroconsult.ro
http://kernel.umbrella.ro/
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