From: Ani Sinha <ani@aristanetworks.com>
To: netdev@vger.kernel.org
Subject: sendmsg() and vlan tags
Date: Fri, 26 Jul 2013 14:30:55 -0700 [thread overview]
Message-ID: <CAOxq_8Ni_WszNj0RW++2jdmLwBxbQCJSSC-AS1Ux5TgMEpd2iA@mail.gmail.com> (raw)
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
next reply other threads:[~2013-07-26 21:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-26 21:30 Ani Sinha [this message]
2013-07-31 0:29 ` sendmsg() and vlan tags Ani Sinha
2013-07-31 0:56 ` Eric Dumazet
2013-07-31 21:01 ` Ani Sinha
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