if_fddi.h 3.6 KB

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  1. /*
  2. * INET An implementation of the TCP/IP protocol suite for the LINUX
  3. * operating system. INET is implemented using the BSD Socket
  4. * interface as the means of communication with the user level.
  5. *
  6. * Global definitions for the ANSI FDDI interface.
  7. *
  8. * Version: @(#)if_fddi.h 1.0.2 Sep 29 2004
  9. *
  10. * Author: Lawrence V. Stefani, <stefani@lkg.dec.com>
  11. *
  12. * if_fddi.h is based on previous if_ether.h and if_tr.h work by
  13. * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  14. * Donald Becker, <becker@super.org>
  15. * Alan Cox, <alan@lxorguk.ukuu.org.uk>
  16. * Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
  17. * Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>
  18. *
  19. * This program is free software; you can redistribute it and/or
  20. * modify it under the terms of the GNU General Public License
  21. * as published by the Free Software Foundation; either version
  22. * 2 of the License, or (at your option) any later version.
  23. */
  24. #ifndef _LINUX_IF_FDDI_H
  25. #define _LINUX_IF_FDDI_H
  26. #include <linux/types.h>
  27. /*
  28. * Define max and min legal sizes. The frame sizes do not include
  29. * 4 byte FCS/CRC (frame check sequence).
  30. */
  31. #define FDDI_K_ALEN 6 /* Octets in one FDDI address */
  32. #define FDDI_K_8022_HLEN 16 /* Total octets in 802.2 header */
  33. #define FDDI_K_SNAP_HLEN 21 /* Total octets in 802.2 SNAP header */
  34. #define FDDI_K_8022_ZLEN 16 /* Min octets in 802.2 frame sans
  35. FCS */
  36. #define FDDI_K_SNAP_ZLEN 21 /* Min octets in 802.2 SNAP frame sans
  37. FCS */
  38. #define FDDI_K_8022_DLEN 4475 /* Max octets in 802.2 payload */
  39. #define FDDI_K_SNAP_DLEN 4470 /* Max octets in 802.2 SNAP payload */
  40. #define FDDI_K_LLC_ZLEN 13 /* Min octets in LLC frame sans FCS */
  41. #define FDDI_K_LLC_LEN 4491 /* Max octets in LLC frame sans FCS */
  42. #define FDDI_K_OUI_LEN 3 /* Octets in OUI in 802.2 SNAP
  43. header */
  44. /* Define FDDI Frame Control (FC) Byte values */
  45. #define FDDI_FC_K_VOID 0x00
  46. #define FDDI_FC_K_NON_RESTRICTED_TOKEN 0x80
  47. #define FDDI_FC_K_RESTRICTED_TOKEN 0xC0
  48. #define FDDI_FC_K_SMT_MIN 0x41
  49. #define FDDI_FC_K_SMT_MAX 0x4F
  50. #define FDDI_FC_K_MAC_MIN 0xC1
  51. #define FDDI_FC_K_MAC_MAX 0xCF
  52. #define FDDI_FC_K_ASYNC_LLC_MIN 0x50
  53. #define FDDI_FC_K_ASYNC_LLC_DEF 0x54
  54. #define FDDI_FC_K_ASYNC_LLC_MAX 0x5F
  55. #define FDDI_FC_K_SYNC_LLC_MIN 0xD0
  56. #define FDDI_FC_K_SYNC_LLC_MAX 0xD7
  57. #define FDDI_FC_K_IMPLEMENTOR_MIN 0x60
  58. #define FDDI_FC_K_IMPLEMENTOR_MAX 0x6F
  59. #define FDDI_FC_K_RESERVED_MIN 0x70
  60. #define FDDI_FC_K_RESERVED_MAX 0x7F
  61. /* Define LLC and SNAP constants */
  62. #define FDDI_EXTENDED_SAP 0xAA
  63. #define FDDI_UI_CMD 0x03
  64. /* Define 802.2 Type 1 header */
  65. struct fddi_8022_1_hdr {
  66. __u8 dsap; /* destination service access point */
  67. __u8 ssap; /* source service access point */
  68. __u8 ctrl; /* control byte #1 */
  69. } __attribute__((packed));
  70. /* Define 802.2 Type 2 header */
  71. struct fddi_8022_2_hdr {
  72. __u8 dsap; /* destination service access point */
  73. __u8 ssap; /* source service access point */
  74. __u8 ctrl_1; /* control byte #1 */
  75. __u8 ctrl_2; /* control byte #2 */
  76. } __attribute__((packed));
  77. /* Define 802.2 SNAP header */
  78. struct fddi_snap_hdr {
  79. __u8 dsap; /* always 0xAA */
  80. __u8 ssap; /* always 0xAA */
  81. __u8 ctrl; /* always 0x03 */
  82. __u8 oui[FDDI_K_OUI_LEN]; /* organizational universal id */
  83. __be16 ethertype; /* packet type ID field */
  84. } __attribute__((packed));
  85. /* Define FDDI LLC frame header */
  86. struct fddihdr {
  87. __u8 fc; /* frame control */
  88. __u8 daddr[FDDI_K_ALEN]; /* destination address */
  89. __u8 saddr[FDDI_K_ALEN]; /* source address */
  90. union {
  91. struct fddi_8022_1_hdr llc_8022_1;
  92. struct fddi_8022_2_hdr llc_8022_2;
  93. struct fddi_snap_hdr llc_snap;
  94. } hdr;
  95. } __attribute__((packed));
  96. #endif /* _LINUX_IF_FDDI_H */