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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2007-05-06 14:51:13 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-07 12:13:02 -0700
commite024715f5f6250179a31716a898800a48cf23b39 (patch)
tree2cba9702be41ff8263d1fb50825f6f17c9f40171 /include/linux
parent85ee2ce8ae7d6716beffc84451dd65cd217dbf7a (diff)
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/linux')
-rw-r--r--include/linux/etherdevice.h12
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
*