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authorJoe Perches <joe@perches.com>2016-06-24 21:32:26 +0300
committerPablo Neira Ayuso <pablo@netfilter.org>2016-07-01 17:37:06 +0300
commit4ae89ad92477219b504a49966ee010fe8dcb85af (patch)
tree6f276cd42d61899ce9f6952c87361c059295790f /include/linux/etherdevice.h
parent468b021b944922e8fe0a30b6b6e0532bb95e4edc (diff)
downloadlinux-4ae89ad92477219b504a49966ee010fe8dcb85af.tar.xz
etherdevice.h & bridge: netfilter: Add and use ether_addr_equal_masked
There are code duplications of a masked ethernet address comparison here so make it a separate function instead. Miscellanea: o Neaten alignment of FWINV macro uses to make it clearer for the reader Signed-off-by: Joe Perches <joe@perches.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/linux/etherdevice.h')
-rw-r--r--include/linux/etherdevice.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 37ff4a6faa9a..6fec9e81bd70 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -374,6 +374,29 @@ static inline bool ether_addr_equal_unaligned(const u8 *addr1, const u8 *addr2)
}
/**
+ * ether_addr_equal_masked - Compare two Ethernet addresses with a mask
+ * @addr1: Pointer to a six-byte array containing the 1st Ethernet address
+ * @addr2: Pointer to a six-byte array containing the 2nd Ethernet address
+ * @mask: Pointer to a six-byte array containing the Ethernet address bitmask
+ *
+ * Compare two Ethernet addresses with a mask, returns true if for every bit
+ * set in the bitmask the equivalent bits in the ethernet addresses are equal.
+ * Using a mask with all bits set is a slower ether_addr_equal.
+ */
+static inline bool ether_addr_equal_masked(const u8 *addr1, const u8 *addr2,
+ const u8 *mask)
+{
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++) {
+ if ((addr1[i] ^ addr2[i]) & mask[i])
+ return false;
+ }
+
+ return true;
+}
+
+/**
* is_etherdev_addr - Tell if given Ethernet address belongs to the device.
* @dev: Pointer to a device structure
* @addr: Pointer to a six-byte array containing the Ethernet address