[mpls-linux-general] configuring mpls through ioctl()

[Muhammad R. S. <sa...@cc...>]

Can I issue ioctl system calls from within my libipq application program to
configure MPLS routing from my application, if yes, can anyone please
provide me with some example code on how to perform this task.
Regards,


Muhammad R. Sami 
Research Assistant, 
Computer Engineering Department 
P.O.Box 354 
King Fahd University of Petroleum & Minerals 
Dhahran 31261 
Saudi Arabia. 
Tel: +96638601423 
Cell: +96657982951 
www.ccse.kfupm.edu.sa/sami

-----Original Message-----
From: James R. Leu [mailto:jl...@mi...] 
Sent: Tuesday, June 22, 2004 7:06 PM
To: Muhammad R. Sami
Subject: Re: [mpls-linux-general] packet identification

All of the mplsadm features can be called via ioctl().  Looking at
the code for mplsadm will give you an example of how to do it.

On Tue, Jun 22, 2004 at 06:58:27PM +0300, Muhammad R. Sami wrote:
> I want to write an application that can issue mplsadm commands from
within,
> such that I do not have to configure MPLS (labels, LSP, EXP) manually.
Here
> are the steps:
> 
> 1- Receive packet from kernel to my application through libipq
> 2- Check packet payload and then decide on NF_ACCEPT/NF_DROP.
> 3- If NF_ACCEPT, then configure MPLS by issuing the mplsadm instructions
> from within the application for all accepted packets.
> 
> I might also need to set queuing priority here on the basis of EXP value.
> 
> Regards,
> 
> Muhammad R. Sami 
> Research Assistant, 
> Computer Engineering Department 
> P.O.Box 354 
> King Fahd University of Petroleum & Minerals 
> Dhahran 31261 
> Saudi Arabia. 
> Tel: +96638601423 
> Cell: +96657982951 
> www.ccse.kfupm.edu.sa/sami
> -----Original Message-----
> From: James R. Leu [mailto:jl...@mi...] 
> Sent: Tuesday, June 22, 2004 6:37 PM
> To: Muhammad R. Sami
> Subject: Re: [mpls-linux-general] packet identification
> 
> On Tue, Jun 22, 2004 at 06:18:11PM +0300, Muhammad R. Sami wrote:
> > I am using libipq to manipulate packets at userspace. I want to know
> whether
> > I can issue an mplsadm configuration command from within my application.
> For
> > example, after receiving the packet from the kernel through libipq, I
> would
> > like to set EXP value for all such packets by issuing the set_exp
command
> > from within that application. If this is possible, please let me know
> soon.
> > regards
> 
> I'm not sure what you're asking.  Are you trying to manipulate the
> packet buffer in userland then send it?  Or are you trying to configure
the
> forwarding plan to do the manipulation?
> 
> 
> > Muhammad R. Sami 
> > Research Assistant, 
> > Computer Engineering Department 
> > P.O.Box 354 
> > King Fahd University of Petroleum & Minerals 
> > Dhahran 31261 
> > Saudi Arabia. 
> > Tel: +96638601423 
> > Cell: +96657982951 
> > www.ccse.kfupm.edu.sa/sami
> > -----Original Message-----
> > From: James R. Leu [mailto:jl...@mi...] 
> > Sent: Monday, June 21, 2004 5:11 PM
> > To: Muhammad R. Sami
> > Subject: Re: [mpls-linux-general] packet identification
> > 
> > On Sun, Jun 20, 2004 at 12:48:24PM +0300, Muhammad R. Sami wrote:
> > > You outlined the following steps, require assistance for the
following.
> > > 
> > >  
> > > 
> > > A quick overview of what you will need to setup:
> > > 
> > > -bind a IPv4 route to a LSP-----DONE
> > > 
> > > -use iptables to identify and mark packets----DONE
> > > 
> > > -use the markings to set EXP values (or choose differnt LSPs)----DONE
> > > 
> > > -use EXP value to determin queuing priority--------How to do this
part?
> > How
> > > can I assign priority on the basis of EXP bits value?
> > 
> > Use the exp2tc or exp2ds instructions then use 'tc' to setup the queues
> and
> > priorities.
> > 
> > Look at:
> >
>
http://www.linuxsecurity.com/resource_files/firewalls/Adv-Routing-HOWTO/2.4r
> > outing.html
> > 
> > In particular read how to use the TCINDEX.
> > 
> > > 
> > >  
> > > 
> > 
> > -- 
> > James R. Leu
> > jl...@mi...
> > 
> 
> -- 
> James R. Leu
> jl...@mi...
> 

-- 
James R. Leu
jl...@mi...