lkml.org 
[lkml]   [2007]   [Oct]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: expected behavior of PF_PACKET on NETIF_F_HW_VLAN_RX device?
On Wed, 31 Oct 2007 14:43:51 -0400
Dave Johnson <djohnson+linux-kernel@sw.starentnetworks.com> wrote:

>
> Depending on the network driver, I'm seeing different behavior if
> a .1q packet is received to an PF_PACKET, SOCK_RAW, ETH_P_ALL socket.
>
>
> On devices what do not use NETIF_F_HW_VLAN_RX, the packet socket gets
> the complete packet with vlan tag included as the driver simply calls
> netif_receive_skb() or equivilant. packet_rcv() then gets the whole
> thing vlan tag included and sends this through the socket.
>
> vlan_skb_recv() also gets these all and will drop them because there
> are no vlans configured.
>

The VLAN acceleration grabs and hides the tag. It is a design flaw
that should be fixed, feel free to post a patch.


--
Stephen Hemminger <shemminger@linux-foundation.org>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-10-31 20:49    [W:0.106 / U:1.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site