LXR linux/net/802/p8023.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *      NET3:   802.3 data link hooks used for IPX 802.3
   4 *
   5 *      802.3 isn't really a protocol data link layer. Some old IPX stuff
   6 *      uses it however. Note that there is only one 802.3 protocol layer
   7 *      in the system. We don't currently support different protocols
   8 *      running raw 802.3 on different devices. Thankfully nobody else
   9 *      has done anything like the old IPX.
  10 */
  11
  12#include <linux/in.h>
  13#include <linux/mm.h>
  14#include <linux/module.h>
  15#include <linux/netdevice.h>
  16#include <linux/skbuff.h>
  17#include <linux/slab.h>
  18
  19#include <net/datalink.h>
  20#include <net/p8022.h>
  21
  22/*
  23 *      Place an 802.3 header on a packet. The driver will do the mac
  24 *      addresses, we just need to give it the buffer length.
  25 */
  26static int p8023_request(struct datalink_proto *dl,
  27                         struct sk_buff *skb, unsigned char *dest_node)
  28{
  29        struct net_device *dev = skb->dev;
  30
  31        dev_hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
  32        return dev_queue_xmit(skb);
  33}
  34
  35/*
  36 *      Create an 802.3 client. Note there can be only one 802.3 client
  37 */
  38struct datalink_proto *make_8023_client(void)
  39{
  40        struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
  41
  42        if (proto) {
  43                proto->header_length = 0;
  44                proto->request       = p8023_request;
  45        }
  46        return proto;
  47}
  48
  49/*
  50 *      Destroy the 802.3 client.
  51 */
  52void destroy_8023_client(struct datalink_proto *dl)
  53{
  54        kfree(dl);
  55}
  56
  57EXPORT_SYMBOL(destroy_8023_client);
  58EXPORT_SYMBOL(make_8023_client);
  59
  60MODULE_LICENSE("GPL");
  61