netdev - Re: [PATCH net-2.6.26] netlink: make socket filters work on netlink

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Message-ID: <47EAAFEC.6000805@trash.net>
Date:	Wed, 26 Mar 2008 21:19:56 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	David Miller <davem@...emloft.net>, Jamal <hadi@...erus.ca>,
	netdev@...r.kernel.org
Subject: Re: [PATCH net-2.6.26] netlink: make socket filters work on netlink

Stephen Hemminger wrote:
> Make socket filters work for netlink unicast and notifications.
> This is useful for applications like Zebra that get overrun with
> messages that are then ignored.
> 
> Note: netlink messages are in host byte order, but packet filter
> state machine operations are done as network byte order.


Do you have an example for a filter for this? I have a similar
patch that adds a new filter instruction for parsing netlink
attributes, which seemed necessary for getting at nested
attributes without too much trouble.

Attached for reference together with a libnl testing
patch for ctnetlink.


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