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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/etherdevice.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/linux/etherdevice.h')
-rw-r--r--include/linux/etherdevice.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
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+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. NET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Definitions for the Ethernet handlers.
+ *
+ * Version: @(#)eth.h 1.0.4 05/13/93
+ *
+ * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *
+ * Relocated to include/linux where it belongs by Alan Cox
+ * <gw4pts@gw4pts.ampr.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * WARNING: This move may well be temporary. This file will get merged with others RSN.
+ *
+ */
+#ifndef _LINUX_ETHERDEVICE_H
+#define _LINUX_ETHERDEVICE_H
+
+#include <linux/if_ether.h>
+#include <linux/random.h>
+
+#ifdef __KERNEL__
+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 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 struct net_device *alloc_etherdev(int sizeof_priv);
+static inline void eth_copy_and_sum (struct sk_buff *dest,
+ const unsigned char *src,
+ int len, int base)
+{
+ memcpy (dest->data, src, len);
+}
+
+/**
+ * is_zero_ether_addr - Determine if give Ethernet address is all
+ * zeros.
+ */
+static inline int is_zero_ether_addr(const u8 *addr)
+{
+ return !(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]);
+}
+
+/**
+ * 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)".
+ *
+ * Return true if the address is valid.
+ */
+static inline int is_valid_ether_addr(const u8 *addr)
+{
+ return !(addr[0]&1) && !is_zero_ether_addr(addr);
+}
+
+/**
+ * random_ether_addr - Generate software assigned random Ethernet address
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Generate a random Ethernet address (MAC) that is not multicast
+ * and has the local assigned bit set.
+ */
+static inline void random_ether_addr(u8 *addr)
+{
+ get_random_bytes (addr, ETH_ALEN);
+ addr [0] &= 0xfe; /* clear multicast bit */
+ addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
+}
+#endif
+
+#endif /* _LINUX_ETHERDEVICE_H */