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Linux/net/802/p8023.c

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  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  */
 26 static 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  */
 38 struct 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  */
 52 void destroy_8023_client(struct datalink_proto *dl)
 53 {
 54         kfree(dl);
 55 }
 56 
 57 EXPORT_SYMBOL(destroy_8023_client);
 58 EXPORT_SYMBOL(make_8023_client);
 59 
 60 MODULE_LICENSE("GPL");
 61 

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