NETLINK_ROUTE sockets in kernel

NETLINK_ROUTE sockets in kernel

[Anil Gunturu]

Hi,
I am trying to undestand the NETLINK_ROUTE protocol sockets on 2.4.18
kernel. Specifically, I am interested in knowing how the kernel
processes the netlink messages that it recieves from user space. I was
browsing the rtnetlink_rcv_msg (net/core/rtnetlink.c) function in the
kernel. But its not clear on how the rtnetlink_links array is
populated for PF_NETLINK family. rtnetlink_init seem to populate for
PF_PACKET and PF_UNSPEC.
Thanks,
-Anil

Re: NETLINK_ROUTE sockets in kernel

[David S. Miller]

On Tue, 2 Nov 2004 11:46:46 -0800
Anil Gunturu <anil.gunturu@gmail.com> wrote:

> But its not clear on how the rtnetlink_links array is
> populated for PF_NETLINK family. rtnetlink_init seem to populate for
> PF_PACKET and PF_UNSPEC.

This is done via net/ipv4/devinet.c:devinet_init() which sets
rtnetlink_links[] for PF_INET.  Please run grep on the kernel
tree for references to rtnetlink_links[] to see how other
protocol family array entries are initialized.

Re: NETLINK_ROUTE sockets in kernel

[John W. Linville]

On Tue, Nov 02, 2004 at 11:46:46AM -0800, Anil Gunturu wrote:
> Hi,
> I am trying to undestand the NETLINK_ROUTE protocol sockets on 2.4.18
> kernel. Specifically, I am interested in knowing how the kernel

Neil Horman <nhorman@redhat.com> has been working on a paper that
may be of use to you...

John
-- 
John W. Linville
linville@tuxdriver.com

Re: NETLINK_ROUTE sockets in kernel

[Herbert Xu]

Anil Gunturu <anil.gunturu@gmail.com> wrote:
>
> kernel. But its not clear on how the rtnetlink_links array is
> populated for PF_NETLINK family. rtnetlink_init seem to populate for

rtnetlink_links[PF_NETLINK] doesn't make sense.  We don't have a
routing system for NETLINK itself, yet.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

Re: NETLINK_ROUTE sockets in kernel

[Neil Horman]

John W. Linville wrote:

>On Tue, Nov 02, 2004 at 11:46:46AM -0800, Anil Gunturu wrote:
>  
>
>>Hi,
>>I am trying to undestand the NETLINK_ROUTE protocol sockets on 2.4.18
>>kernel. Specifically, I am interested in knowing how the kernel
>>    
>>
>
>Neil Horman <nhorman@redhat.com> has been working on a paper that
>may be of use to you...
>
>John
>  
>
you can fetch the latest version of that paper from my people page:
http://people.redhat.com/nhorman

I've been working on it a little more and may have an update for it soon.

Thanks for the reference john!
Neil

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 *Red Hat, Inc.
 *nhorman@redhat.com
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