if_tun.h 3.7 KB

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  1. /*
  2. * Universal TUN/TAP device driver.
  3. * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
  4. *
  5. * This program is free software; you can redistribute it and/or modify
  6. * it under the terms of the GNU General Public License as published by
  7. * the Free Software Foundation; either version 2 of the License, or
  8. * (at your option) any later version.
  9. *
  10. * This program is distributed in the hope that it will be useful,
  11. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13. * GNU General Public License for more details.
  14. */
  15. #ifndef __IF_TUN_H
  16. #define __IF_TUN_H
  17. #include <linux/types.h>
  18. #include <linux/if_ether.h>
  19. #include <linux/filter.h>
  20. /* Read queue size */
  21. #define TUN_READQ_SIZE 500
  22. /* TUN device type flags: deprecated. Use IFF_TUN/IFF_TAP instead. */
  23. #define TUN_TUN_DEV IFF_TUN
  24. #define TUN_TAP_DEV IFF_TAP
  25. #define TUN_TYPE_MASK 0x000f
  26. /* Ioctl defines */
  27. #define TUNSETNOCSUM _IOW('T', 200, int)
  28. #define TUNSETDEBUG _IOW('T', 201, int)
  29. #define TUNSETIFF _IOW('T', 202, int)
  30. #define TUNSETPERSIST _IOW('T', 203, int)
  31. #define TUNSETOWNER _IOW('T', 204, int)
  32. #define TUNSETLINK _IOW('T', 205, int)
  33. #define TUNSETGROUP _IOW('T', 206, int)
  34. #define TUNGETFEATURES _IOR('T', 207, unsigned int)
  35. #define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
  36. #define TUNSETTXFILTER _IOW('T', 209, unsigned int)
  37. #define TUNGETIFF _IOR('T', 210, unsigned int)
  38. #define TUNGETSNDBUF _IOR('T', 211, int)
  39. #define TUNSETSNDBUF _IOW('T', 212, int)
  40. #define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
  41. #define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
  42. #define TUNGETVNETHDRSZ _IOR('T', 215, int)
  43. #define TUNSETVNETHDRSZ _IOW('T', 216, int)
  44. #define TUNSETQUEUE _IOW('T', 217, int)
  45. #define TUNSETIFINDEX _IOW('T', 218, unsigned int)
  46. #define TUNGETFILTER _IOR('T', 219, struct sock_fprog)
  47. #define TUNSETVNETLE _IOW('T', 220, int)
  48. #define TUNGETVNETLE _IOR('T', 221, int)
  49. /* The TUNSETVNETBE and TUNGETVNETBE ioctls are for cross-endian support on
  50. * little-endian hosts. Not all kernel configurations support them, but all
  51. * configurations that support SET also support GET.
  52. */
  53. #define TUNSETVNETBE _IOW('T', 222, int)
  54. #define TUNGETVNETBE _IOR('T', 223, int)
  55. /* TUNSETIFF ifr flags */
  56. #define IFF_TUN 0x0001
  57. #define IFF_TAP 0x0002
  58. #define IFF_NO_PI 0x1000
  59. /* This flag has no real effect */
  60. #define IFF_ONE_QUEUE 0x2000
  61. #define IFF_VNET_HDR 0x4000
  62. #define IFF_TUN_EXCL 0x8000
  63. #define IFF_MULTI_QUEUE 0x0100
  64. #define IFF_ATTACH_QUEUE 0x0200
  65. #define IFF_DETACH_QUEUE 0x0400
  66. /* read-only flag */
  67. #define IFF_PERSIST 0x0800
  68. #define IFF_NOFILTER 0x1000
  69. /* Socket options */
  70. #define TUN_TX_TIMESTAMP 1
  71. /* Features for GSO (TUNSETOFFLOAD). */
  72. #define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
  73. #define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
  74. #define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
  75. #define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
  76. #define TUN_F_UFO 0x10 /* I can handle UFO packets */
  77. /* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
  78. #define TUN_PKT_STRIP 0x0001
  79. struct tun_pi {
  80. __u16 flags;
  81. __be16 proto;
  82. };
  83. /*
  84. * Filter spec (used for SETXXFILTER ioctls)
  85. * This stuff is applicable only to the TAP (Ethernet) devices.
  86. * If the count is zero the filter is disabled and the driver accepts
  87. * all packets (promisc mode).
  88. * If the filter is enabled in order to accept broadcast packets
  89. * broadcast addr must be explicitly included in the addr list.
  90. */
  91. #define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
  92. struct tun_filter {
  93. __u16 flags; /* TUN_FLT_ flags see above */
  94. __u16 count; /* Number of addresses */
  95. __u8 addr[0][ETH_ALEN];
  96. };
  97. #endif /* __IF_TUN_H */