linux-kernel - Re: Get source and destination info

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Message-ID: <711567.2389.qm@web36603.mail.mud.yahoo.com>
Date:	Sun, 2 Sep 2007 16:30:44 -0700 (PDT)
From:	Casey Schaufler <casey@...aufler-ca.com>
To:	Shahbaz Khan <shaz.linux@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>, selinux@...o.nsa.gov
Subject: Re: Get source and destination info


--- Shahbaz Khan <shaz.linux@...il.com> wrote:

> Hi,
> 
> I am trying to figure out what part in the kernel code is the point
> from where I can get source and destination ip-address, port, security
> labels (selinux etc) from a packet before I export it to application
> space for my needs. Any hints?

Look into the netlabel and xfrm code. In Smack it gets dealt with
in smack_lsm.c, but Smack only uses netlabel. SELinux spreads the
handling into a number of files, including hooks.c, netlabel.c, xfrm.c,
and ss/services.c.


Casey Schaufler
casey@...aufler-ca.com
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