選択できるのは25トピックまでです。 トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。

nullnet.c 1.8KB

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  1. /*
  2. * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
  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 as
  6. * published by the Free Software Foundation; either version 2 of the
  7. * License, or any later version.
  8. *
  9. * This program is distributed in the hope that it will be useful, but
  10. * WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. * General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU General Public License
  15. * along with this program; if not, write to the Free Software
  16. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17. * 02110-1301, USA.
  18. *
  19. * You can also choose to distribute this program under the terms of
  20. * the Unmodified Binary Distribution Licence (as given in the file
  21. * COPYING.UBDL), provided that you have satisfied its requirements.
  22. */
  23. FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
  24. #include <stdint.h>
  25. #include <errno.h>
  26. #include <ipxe/iobuf.h>
  27. #include <ipxe/netdevice.h>
  28. /** @file
  29. *
  30. * Null network device
  31. *
  32. */
  33. static int null_open ( struct net_device *netdev __unused ) {
  34. return -ENODEV;
  35. };
  36. static void null_close ( struct net_device *netdev __unused ) {
  37. /* Do nothing */
  38. };
  39. static int null_transmit ( struct net_device *netdev __unused,
  40. struct io_buffer *iobuf __unused ) {
  41. return -ENODEV;
  42. };
  43. static void null_poll ( struct net_device *netdev __unused ) {
  44. /* Do nothing */
  45. }
  46. static void null_irq ( struct net_device *netdev __unused,
  47. int enable __unused ) {
  48. /* Do nothing */
  49. }
  50. struct net_device_operations null_netdev_operations = {
  51. .open = null_open,
  52. .close = null_close,
  53. .transmit = null_transmit,
  54. .poll = null_poll,
  55. .irq = null_irq,
  56. };