netdev - Re: sendmsg() and vlan tags

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Message-ID: <CAOxq_8PW9ggzOeoXJGxP1+48O=0A=5HAdpP9JJoe_iz=a2vgtw@mail.gmail.com>
Date:	Tue, 30 Jul 2013 17:29:30 -0700
From:	Ani Sinha <ani@...stanetworks.com>
To:	netdev@...r.kernel.org
Subject: Re: sendmsg() and vlan tags

hello folks.

Can anyone please shed lights on this?

thanks,
ani


On Fri, Jul 26, 2013 at 2:30 PM, Ani Sinha <ani@...stanetworks.com> wrote:
> Hi folks,
>
> We know that (since Linux 3.0) on raw sockets, the recvmsg() api
> returns the vlan tag information of the packet in the packet aux data.
> I looked at the kernel code and it seems on the TX side, in sendmsg(),
> we do not accept the vlan tag data from userland for a raw packet. So
> if the userland sends a raw packet using sendmsg() with vlan tag
> information in aux data, it will be discarded.
>
> Is my analysis correct?
>
> Cheers,
> Ani



-- 
Ani
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