[legal] Relicense files under GPL2_OR_LATER_OR_UBDL
These files cannot be automatically relicensed by util/relicense.pl
since they either contain unusual but trivial contributions (such as
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
[netdevice] Add vlan_tag() to get the VLAN tag of a network device
The iBFT has a VLAN field that should be filled in. Add the
vlan_tag() function to extract the VLAN tag of a network device.
Since VLAN support is optional, define a weak function that returns 0
when iPXE is built without VLAN support.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Some network cards automatically strip the VLAN header, providing the
VLAN tag via a side channel such as a completion queue entry. These
cards need to be able to report receive completions directly against
the relevant VLAN device.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
VLAN headers are allowed to contain a VLAN tag of zero, indicating
that the header specifies only a priority and that the packet does not
belong to any VLAN. The easiest way to handle this is to treat VLAN 0
as being a normal VLAN.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Michael Brown