Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / include / linux / etherdevice.h

diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index a147825..e4b09d2 100644 (file)
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -25,6 +25,7 @@
 #define _LINUX_ETHERDEVICE_H
 
 #include <linux/if_ether.h>
+#include <linux/netdevice.h>
 #include <linux/random.h>
 
 #ifdef __KERNEL__
@@ -32,7 +33,7 @@ extern int            eth_header(struct sk_buff *skb, struct net_device *dev,
                                   unsigned short type, void *daddr,
                                   void *saddr, unsigned len);
 extern int             eth_rebuild_header(struct sk_buff *skb);
-extern unsigned short  eth_type_trans(struct sk_buff *skb, struct net_device *dev);
+extern __be16          eth_type_trans(struct sk_buff *skb, struct net_device *dev);
 extern void            eth_header_cache_update(struct hh_cache *hh, struct net_device *dev,
                                                unsigned char * haddr);
 extern int             eth_header_cache(struct neighbour *neigh,
@@ -47,8 +48,10 @@ static inline void eth_copy_and_sum (struct sk_buff *dest,
 }
 
 /**
- * is_zero_ether_addr - Determine if give Ethernet address is all
- * zeros.
+ * is_zero_ether_addr - Determine if give Ethernet address is all zeros.
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Return true if the address is all zeroes.
  */
 static inline int is_zero_ether_addr(const u8 *addr)
 {
@@ -56,16 +59,26 @@ static inline int is_zero_ether_addr(const u8 *addr)
 }
 
 /**
- * is_multicast_ether_addr - Determine if the given Ethernet address is a
- * multicast address.
- *
+ * is_multicast_ether_addr - Determine if the Ethernet address is a multicast.
  * @addr: Pointer to a six-byte array containing the Ethernet address
  *
  * Return true if the address is a multicast address.
+ * By definition the broadcast address is also a multicast address.
  */
 static inline int is_multicast_ether_addr(const u8 *addr)
 {
-       return addr[0] & 0x01;
+       return (0x01 & addr[0]);
+}
+
+/**
+ * is_broadcast_ether_addr - Determine if the Ethernet address is broadcast
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Return true if the address is the broadcast address.
+ */
+static inline int is_broadcast_ether_addr(const u8 *addr)
+{
+       return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff;
 }
 
 /**
@@ -79,9 +92,8 @@ static inline int is_multicast_ether_addr(const u8 *addr)
  */
 static inline int is_valid_ether_addr(const u8 *addr)
 {
-       /* FF:FF:FF:FF:FF:FF is a multicast address so we don't need to
-        * explicitly check for it here. */
-       return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr);
+       return !is_multicast_ether_addr(addr) && !is_zero_ether_addr(addr) &&
+              !is_broadcast_ether_addr(addr);
 }
 
 /**
@@ -97,6 +109,22 @@ static inline void random_ether_addr(u8 *addr)
        addr [0] &= 0xfe;       /* clear multicast bit */
        addr [0] |= 0x02;       /* set local assignment bit (IEEE802) */
 }
+
+/**
+ * compare_ether_addr - Compare two Ethernet addresses
+ * @addr1: Pointer to a six-byte array containing the Ethernet address
+ * @addr2: Pointer other six-byte array containing the Ethernet address
+ *
+ * Compare two ethernet addresses, returns 0 if equal
+ */
+static inline unsigned compare_ether_addr(const u8 *addr1, const u8 *addr2)
+{
+       const u16 *a = (const u16 *) addr1;
+       const u16 *b = (const u16 *) addr2;
+
+       BUILD_BUG_ON(ETH_ALEN != 6);
+       return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0;
+}
 #endif /* __KERNEL__ */
 
 #endif /* _LINUX_ETHERDEVICE_H */