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| author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2007-05-06 14:51:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 12:13:02 -0700 |
| commit | e024715f5f6250179a31716a898800a48cf23b39 (patch) | |
| tree | 2cba9702be41ff8263d1fb50825f6f17c9f40171 /include | |
| parent | 85ee2ce8ae7d6716beffc84451dd65cd217dbf7a (diff) | |
| download | linux-stable-e024715f5f6250179a31716a898800a48cf23b39.tar.gz linux-stable-e024715f5f6250179a31716a898800a48cf23b39.tar.bz2 linux-stable-e024715f5f6250179a31716a898800a48cf23b39.zip | |
uml: improve checking and diagnostics of ethernet MACs
Improve checking and diagnostics for broadcast and multicast Ethernet MAC
addresses, and distinguish between those cases in output; also make sure the
device is assigned a MAC address valid only locally to avoid collisions.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/etherdevice.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index 745c988359c0..071c67abed86 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -71,6 +71,18 @@ static inline int is_multicast_ether_addr(const u8 *addr) } /** + * is_local_ether_addr - Determine if the Ethernet address is locally-assigned + * one (IEEE 802). + * @addr: Pointer to a six-byte array containing the Ethernet address + * + * Return true if the address is a local address. + */ +static inline int is_local_ether_addr(const u8 *addr) +{ + return (0x02 & addr[0]); +} + +/** * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast * @addr: Pointer to a six-byte array containing the Ethernet address * |