b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 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"); |