linux 2.6.16.38 w/ vs2.0.3-rc1

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

diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 6af5ecf..745c988 100644 (file)
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -7,7 +7,7 @@
  *
  * Version:    @(#)eth.h       1.0.4   05/13/93
  *
- * Authors:    Ross Biro, <bir7@leland.Stanford.Edu>
+ * Authors:    Ross Biro
  *             Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  *
  *             Relocated to include/linux where it belongs by Alan Cox 
@@ -25,6 +25,7 @@
 #define _LINUX_ETHERDEVICE_H
 
 #include <linux/if_ether.h>
+#include <linux/netdevice.h>
 #include <linux/random.h>
 
 #ifdef __KERNEL__
@@ -32,13 +33,11 @@ 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,
                                         struct hh_cache *hh);
-extern int             eth_header_parse(struct sk_buff *skb,
-                                        unsigned char *haddr);
 
 extern struct net_device *alloc_etherdev(int sizeof_priv);
 static inline void eth_copy_and_sum (struct sk_buff *dest, 
@@ -48,21 +47,54 @@ static inline void eth_copy_and_sum (struct sk_buff *dest,
        memcpy (dest->data, src, len);
 }
 
+/**
+ * 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)
+{
+       return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
+}
+
+/**
+ * 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 (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;
+}
+
 /**
  * is_valid_ether_addr - Determine if the given Ethernet address is valid
  * @addr: Pointer to a six-byte array containing the Ethernet address
  *
  * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
- * a multicast address, and is not FF:FF:FF:FF:FF:FF.  The multicast
- * and FF:FF:... tests are combined into the single test "!(addr[0]&1)".
+ * a multicast address, and is not FF:FF:FF:FF:FF:FF.
  *
  * Return true if the address is valid.
  */
-static inline int is_valid_ether_addr( const u8 *addr )
+static inline int is_valid_ether_addr(const u8 *addr)
 {
-       const char zaddr[6] = {0,};
-
-       return !(addr[0]&1) && memcmp( addr, zaddr, 6);
+       /* 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);
 }
 
 /**
@@ -78,6 +110,22 @@ static inline void random_ether_addr(u8 *addr)
        addr [0] &= 0xfe;       /* clear multicast bit */
        addr [0] |= 0x02;       /* set local assignment bit (IEEE802) */
 }
-#endif
+
+/**
+ * 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 */