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 */
p8023_request(struct datalink_proto * dl,struct sk_buff * skb,unsigned char * dest_node)30 static 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 */
make_8023_client(void)42 struct 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 */
destroy_8023_client(struct datalink_proto * dl)56 void destroy_8023_client(struct datalink_proto *dl)
57 {
58 kfree(dl);
59 }
60
61 EXPORT_SYMBOL(destroy_8023_client);
62 EXPORT_SYMBOL(make_8023_client);
63
64 MODULE_LICENSE("GPL");
65