LXR linux/net/802/p8023.c

   1/*
   2 *      NET3:   802.3 data link hooks used for IPX 802.3
   3 *
   4 *      This program is free software; you can redistribute it and/or
   5 *      modify it under the terms of the GNU General Public License
   6 *      as published by the Free Software Foundation; either version
   7 *      2 of the License, or (at your option) any later version.
   8 *
   9 *      802.3 isn't really a protocol data link layer. Some old IPX stuff
  10 *      uses it however. Note that there is only one 802.3 protocol layer
  11 *      in the system. We don't currently support different protocols
  12 *      running raw 802.3 on different devices. Thankfully nobody else
  13 *      has done anything like the old IPX.
  14 */
  15
  16#include <linux/in.h>
  17#include <linux/mm.h>
  18#include <linux/module.h>
  19#include <linux/netdevice.h>
  20#include <linux/skbuff.h>
  21#include <linux/slab.h>
  22
  23#include <net/datalink.h>
  24#include <net/p8022.h>
  25
  26/*
  27 *      Place an 802.3 header on a packet. The driver will do the mac
  28 *      addresses, we just need to give it the buffer length.
  29 */
  30static int p8023_request(struct datalink_proto *dl,
  31                         struct sk_buff *skb, unsigned char *dest_node)
  32{
  33        struct net_device *dev = skb->dev;
  34
  35        dev_hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
  36        return dev_queue_xmit(skb);
  37}
  38
  39/*
  40 *      Create an 802.3 client. Note there can be only one 802.3 client
  41 */
  42struct datalink_proto *make_8023_client(void)
  43{
  44        struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
  45
  46        if (proto) {
  47                proto->header_length = 0;
  48                proto->request       = p8023_request;
  49        }
  50        return proto;
  51}
  52
  53/*
  54 *      Destroy the 802.3 client.
  55 */
  56void destroy_8023_client(struct datalink_proto *dl)
  57{
  58        kfree(dl);
  59}
  60
  61EXPORT_SYMBOL(destroy_8023_client);
  62EXPORT_SYMBOL(make_8023_client);
  63
  64MODULE_LICENSE("GPL");
  65