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/netdevice.h>
17 #include <linux/skbuff.h>
18 #include <net/datalink.h>
19 #include <linux/mm.h>
20 #include <linux/in.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
p8023_datalink_header(struct datalink_proto * dl,struct sk_buff * skb,unsigned char * dest_node)27 static void p8023_datalink_header(struct datalink_proto *dl,
28 struct sk_buff *skb, unsigned char *dest_node)
29 {
30 struct net_device *dev = skb->dev;
31 dev->hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
32 }
33
34 /*
35 * Create an 802.3 client. Note there can be only one 802.3 client
36 */
37
make_8023_client(void)38 struct datalink_proto *make_8023_client(void)
39 {
40 struct datalink_proto *proto;
41
42 proto = (struct datalink_proto *) kmalloc(sizeof(*proto), GFP_ATOMIC);
43 if (proto != NULL)
44 {
45 proto->type_len = 0;
46 proto->header_length = 0;
47 proto->datalink_header = p8023_datalink_header;
48 proto->string_name = "802.3";
49 }
50 return proto;
51 }
52
53 /*
54 * Destroy the 802.3 client.
55 */
56
destroy_8023_client(struct datalink_proto * dl)57 void destroy_8023_client(struct datalink_proto *dl)
58 {
59 if (dl)
60 kfree(dl);
61 }
62
63