1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * NET3: 802.3 data link hooks used for IPX 802.3
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * 802.3 isn't really a protocol data link layer. Some old IPX stuff
6*4882a593Smuzhiyun * uses it however. Note that there is only one 802.3 protocol layer
7*4882a593Smuzhiyun * in the system. We don't currently support different protocols
8*4882a593Smuzhiyun * running raw 802.3 on different devices. Thankfully nobody else
9*4882a593Smuzhiyun * has done anything like the old IPX.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/in.h>
13*4882a593Smuzhiyun #include <linux/mm.h>
14*4882a593Smuzhiyun #include <linux/module.h>
15*4882a593Smuzhiyun #include <linux/netdevice.h>
16*4882a593Smuzhiyun #include <linux/skbuff.h>
17*4882a593Smuzhiyun #include <linux/slab.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include <net/datalink.h>
20*4882a593Smuzhiyun #include <net/p8022.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /*
23*4882a593Smuzhiyun * Place an 802.3 header on a packet. The driver will do the mac
24*4882a593Smuzhiyun * addresses, we just need to give it the buffer length.
25*4882a593Smuzhiyun */
p8023_request(struct datalink_proto * dl,struct sk_buff * skb,unsigned char * dest_node)26*4882a593Smuzhiyun static int p8023_request(struct datalink_proto *dl,
27*4882a593Smuzhiyun struct sk_buff *skb, unsigned char *dest_node)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun struct net_device *dev = skb->dev;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun dev_hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
32*4882a593Smuzhiyun return dev_queue_xmit(skb);
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun /*
36*4882a593Smuzhiyun * Create an 802.3 client. Note there can be only one 802.3 client
37*4882a593Smuzhiyun */
make_8023_client(void)38*4882a593Smuzhiyun struct datalink_proto *make_8023_client(void)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun if (proto) {
43*4882a593Smuzhiyun proto->header_length = 0;
44*4882a593Smuzhiyun proto->request = p8023_request;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun return proto;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun /*
50*4882a593Smuzhiyun * Destroy the 802.3 client.
51*4882a593Smuzhiyun */
destroy_8023_client(struct datalink_proto * dl)52*4882a593Smuzhiyun void destroy_8023_client(struct datalink_proto *dl)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun kfree(dl);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun EXPORT_SYMBOL(destroy_8023_client);
58*4882a593Smuzhiyun EXPORT_SYMBOL(make_8023_client);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun MODULE_LICENSE("GPL");
61