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| author | Michael Brown <mcb30@ipxe.org> | 2023-01-14 00:31:54 +0000 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2023-01-14 00:31:54 +0000 |
| commit | e03647347da1dbfc51df4ab87c1f739254280e11 (patch) | |
| tree | da0ce76e7941f2af19a85056d2d84e9b3903e2db /src/net/netdevice.c | |
| parent | 47af48012e2afaaf56108466fb967009670660bb (diff) | |
| download | ipxe-netidx.zip ipxe-netidx.tar.gz ipxe-netidx.tar.bz2 | |
[netdevice] Allow duplicate MAC addressesnetidx
Many laptops now include the ability to specify a "system-specific MAC
address" (also known as "pass-through MAC"), which is supposed to be
used for both the onboard NIC and for any attached docking station or
other USB NIC. This is intended to simplify interoperability with
software or hardware that relies on a MAC address to recognise an
individual machine: for example, a deployment server may associate the
MAC address with a particular operating system image to be deployed.
This therefore creates legitimate situations in which duplicate MAC
addresses may exist within the same system. Remove the code that
rejects attempts to register a network device with a duplicate MAC.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/net/netdevice.c')
| -rw-r--r-- | src/net/netdevice.c | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/src/net/netdevice.c b/src/net/netdevice.c index 597c622..07961bf 100644 --- a/src/net/netdevice.c +++ b/src/net/netdevice.c @@ -735,18 +735,6 @@ int register_netdev ( struct net_device *netdev ) { ll_protocol->ll_header_len ); } - /* Reject network devices that are already available via a - * different hardware device. - */ - duplicate = find_netdev_by_ll_addr ( ll_protocol, netdev->ll_addr ); - if ( duplicate && ( duplicate->dev != netdev->dev ) ) { - DBGC ( netdev, "NETDEV rejecting duplicate (phys %s) of %s " - "(phys %s)\n", netdev->dev->name, duplicate->name, - duplicate->dev->name ); - rc = -EEXIST; - goto err_duplicate; - } - /* Reject named network devices that already exist */ if ( netdev->name[0] && ( duplicate = find_netdev ( netdev->name ) ) ) { DBGC ( netdev, "NETDEV rejecting duplicate name %s\n", @@ -1003,27 +991,6 @@ struct net_device * find_netdev_by_location ( unsigned int bus_type, } /** - * Get network device by link-layer address - * - * @v ll_protocol Link-layer protocol - * @v ll_addr Link-layer address - * @ret netdev Network device, or NULL - */ -struct net_device * find_netdev_by_ll_addr ( struct ll_protocol *ll_protocol, - const void *ll_addr ) { - struct net_device *netdev; - - list_for_each_entry ( netdev, &net_devices, list ) { - if ( ( netdev->ll_protocol == ll_protocol ) && - ( memcmp ( netdev->ll_addr, ll_addr, - ll_protocol->ll_addr_len ) == 0 ) ) - return netdev; - } - - return NULL; -} - -/** * Get most recently opened network device * * @ret netdev Most recently opened network device, or NULL |