p8023.c 1.4 KB

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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. #include <linux/in.h>
  12. #include <linux/mm.h>
  13. #include <linux/module.h>
  14. #include <linux/netdevice.h>
  15. #include <linux/skbuff.h>
  16. #include <linux/slab.h>
  17. #include <net/datalink.h>
  18. #include <net/p8022.h>
  19. /*
  20. * Place an 802.3 header on a packet. The driver will do the mac
  21. * addresses, we just need to give it the buffer length.
  22. */
  23. static int p8023_request(struct datalink_proto *dl,
  24. struct sk_buff *skb, unsigned char *dest_node)
  25. {
  26. struct net_device *dev = skb->dev;
  27. dev_hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
  28. return dev_queue_xmit(skb);
  29. }
  30. /*
  31. * Create an 802.3 client. Note there can be only one 802.3 client
  32. */
  33. struct datalink_proto *make_8023_client(void)
  34. {
  35. struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
  36. if (proto) {
  37. proto->header_length = 0;
  38. proto->request = p8023_request;
  39. }
  40. return proto;
  41. }
  42. /*
  43. * Destroy the 802.3 client.
  44. */
  45. void destroy_8023_client(struct datalink_proto *dl)
  46. {
  47. kfree(dl);
  48. }
  49. EXPORT_SYMBOL(destroy_8023_client);
  50. EXPORT_SYMBOL(make_8023_client);
  51. MODULE_LICENSE("GPL");