p8023.c 1.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263
  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. #include <linux/in.h>
  16. #include <linux/mm.h>
  17. #include <linux/module.h>
  18. #include <linux/netdevice.h>
  19. #include <linux/skbuff.h>
  20. #include <net/datalink.h>
  21. #include <net/p8022.h>
  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. dev->hard_header(skb, dev, ETH_P_802_3, dest_node, NULL, skb->len);
  31. return dev_queue_xmit(skb);
  32. }
  33. /*
  34. * Create an 802.3 client. Note there can be only one 802.3 client
  35. */
  36. struct datalink_proto *make_8023_client(void)
  37. {
  38. struct datalink_proto *proto = kmalloc(sizeof(*proto), GFP_ATOMIC);
  39. if (proto) {
  40. proto->header_length = 0;
  41. proto->request = p8023_request;
  42. }
  43. return proto;
  44. }
  45. /*
  46. * Destroy the 802.3 client.
  47. */
  48. void destroy_8023_client(struct datalink_proto *dl)
  49. {
  50. kfree(dl);
  51. }
  52. EXPORT_SYMBOL(destroy_8023_client);
  53. EXPORT_SYMBOL(make_8023_client);
  54. MODULE_LICENSE("GPL");