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net: add ETHER_IS_ZERO macro similar to ETHER_IS_BROADCAST

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Some places in network code may need to verify that an ethernet address
is not the 'zero' address. Provide a standard macro ETHER_IS_ZERO for
this purpose, similar to the ETHER_IS_BROADCAST macro already available.

This patch also removes previous ETHER_IS_ZERO definitions in several
USB ethernet drivers, in favor of this centrally-located macro.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>

Submitted by:	Jacob Keller <jacob.e.keller@intel.com>
Reviewed by:	erj@
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D21240
This commit is contained in:
Eric Joyner 2019-11-05 00:12:21 +00:00
parent db8e8f1ede
commit 74954211d6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=354345
4 changed files with 3 additions and 9 deletions
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3
sys/dev/usb/net/if_muge.c
View File

@ -157,9 +157,6 @@ do { \
#define muge_err_printf(sc, fmt, args...) \
device_printf((sc)->sc_ue.ue_dev, "error: " fmt, ##args)
#define ETHER_IS_ZERO(addr) \
(!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
#define ETHER_IS_VALID(addr) \
(!ETHER_IS_MULTICAST(addr) && !ETHER_IS_ZERO(addr))

3
sys/dev/usb/net/if_smsc.c
View File

@ -171,9 +171,6 @@ static const struct usb_device_id smsc_devs[] = {
device_printf((sc)->sc_ue.ue_dev, "error: " fmt, ##args)
#define ETHER_IS_ZERO(addr) \
(!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
#define ETHER_IS_VALID(addr) \
(!ETHER_IS_MULTICAST(addr) && !ETHER_IS_ZERO(addr))

3
sys/dev/usb/net/if_ure.c
View File

@ -68,9 +68,6 @@ SYSCTL_INT(_hw_usb_ure, OID_AUTO, debug, CTLFLAG_RWTUN, &ure_debug, 0,
"Debug level");
#endif
#define ETHER_IS_ZERO(addr) \
(!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
/*
* Various supported device vendors/products.
*/

3
sys/net/ethernet.h
View File

@ -74,6 +74,9 @@ struct ether_addr {
#define ETHER_IS_BROADCAST(addr) \
(((addr)[0] & (addr)[1] & (addr)[2] & \
(addr)[3] & (addr)[4] & (addr)[5]) == 0xff)
#define ETHER_IS_ZERO(addr) \
(((addr)[0] | (addr)[1] | (addr)[2] | \
(addr)[3] | (addr)[4] | (addr)[5]) == 0x00)
/*
* 802.1q Virtual LAN header.