lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CAF=yD-Lsbr7f7aPUsFF3gCtFdyR8yb1=VBPJGQuxv_JbrJud6Q@mail.gmail.com>
Date:   Thu, 13 Apr 2017 10:37:07 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Miroslav Lichvar <mlichvar@...hat.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        Richard Cochran <richardcochran@...il.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        "Keller, Jacob E" <jacob.e.keller@...el.com>,
        Denny Page <dennypage@...com>, Jiri Benc <jbenc@...hat.com>
Subject: Re: [RFC PATCH 3/7] net: add option to get information about
 timestamped packets

On Wed, Apr 12, 2017 at 10:17 AM, Miroslav Lichvar <mlichvar@...hat.com> wrote:
> Extend the skb_shared_hwtstamps structure with the index of the
> real interface which received or transmitted the packet and the length
> of the packet at layer 2.

The original packet is received along with the timestamp. Why is this L2
length needed?

> Add a SOF_TIMESTAMPING_OPT_PKTINFO flag to
> the SO_TIMESTAMPING option to allow applications to get this information
> as struct scm_ts_pktinfo in SCM_TIMESTAMPING_PKTINFO control message.

This patch saves skb->dev->ifindex, which is the same as existing
SOF_TIMESTAMPING_OPT_CMSG. See also the bug fix for that
feature I sent yesterday: http://patchwork.ozlabs.org/patch/750197/

If the intent is to return a different ifindex, I would still suggest using
the existing pktinfo infrastructure, but changing the ifindex that is
recorded.

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ