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 _UAPI_LINUX_IF_FDDI_H 25 #define _UAPI_LINUX_IF_FDDI_H 26 27 #include <linux/types.h> 28 29 /* 30 * Define max and min legal sizes. The frame sizes do not include 31 * 4 byte FCS/CRC (frame check sequence). 32 */ 33 #define FDDI_K_ALEN 6 /* Octets in one FDDI address */ 34 #define FDDI_K_8022_HLEN 16 /* Total octets in 802.2 header */ 35 #define FDDI_K_SNAP_HLEN 21 /* Total octets in 802.2 SNAP header */ 36 #define FDDI_K_8022_ZLEN 16 /* Min octets in 802.2 frame sans 37 FCS */ 38 #define FDDI_K_SNAP_ZLEN 21 /* Min octets in 802.2 SNAP frame sans 39 FCS */ 40 #define FDDI_K_8022_DLEN 4475 /* Max octets in 802.2 payload */ 41 #define FDDI_K_SNAP_DLEN 4470 /* Max octets in 802.2 SNAP payload */ 42 #define FDDI_K_LLC_ZLEN 13 /* Min octets in LLC frame sans FCS */ 43 #define FDDI_K_LLC_LEN 4491 /* Max octets in LLC frame sans FCS */ 44 #define FDDI_K_OUI_LEN 3 /* Octets in OUI in 802.2 SNAP 45 header */ 46 47 /* Define FDDI Frame Control (FC) Byte values */ 48 #define FDDI_FC_K_VOID 0x00 49 #define FDDI_FC_K_NON_RESTRICTED_TOKEN 0x80 50 #define FDDI_FC_K_RESTRICTED_TOKEN 0xC0 51 #define FDDI_FC_K_SMT_MIN 0x41 52 #define FDDI_FC_K_SMT_MAX 0x4F 53 #define FDDI_FC_K_MAC_MIN 0xC1 54 #define FDDI_FC_K_MAC_MAX 0xCF 55 #define FDDI_FC_K_ASYNC_LLC_MIN 0x50 56 #define FDDI_FC_K_ASYNC_LLC_DEF 0x54 57 #define FDDI_FC_K_ASYNC_LLC_MAX 0x5F 58 #define FDDI_FC_K_SYNC_LLC_MIN 0xD0 59 #define FDDI_FC_K_SYNC_LLC_MAX 0xD7 60 #define FDDI_FC_K_IMPLEMENTOR_MIN 0x60 61 #define FDDI_FC_K_IMPLEMENTOR_MAX 0x6F 62 #define FDDI_FC_K_RESERVED_MIN 0x70 63 #define FDDI_FC_K_RESERVED_MAX 0x7F 64 65 /* Define LLC and SNAP constants */ 66 #define FDDI_EXTENDED_SAP 0xAA 67 #define FDDI_UI_CMD 0x03 68 69 /* Define 802.2 Type 1 header */ 70 struct fddi_8022_1_hdr { 71 __u8 dsap; /* destination service access point */ 72 __u8 ssap; /* source service access point */ 73 __u8 ctrl; /* control byte #1 */ 74 } __attribute__((packed)); 75 76 /* Define 802.2 Type 2 header */ 77 struct fddi_8022_2_hdr { 78 __u8 dsap; /* destination service access point */ 79 __u8 ssap; /* source service access point */ 80 __u8 ctrl_1; /* control byte #1 */ 81 __u8 ctrl_2; /* control byte #2 */ 82 } __attribute__((packed)); 83 84 /* Define 802.2 SNAP header */ 85 struct fddi_snap_hdr { 86 __u8 dsap; /* always 0xAA */ 87 __u8 ssap; /* always 0xAA */ 88 __u8 ctrl; /* always 0x03 */ 89 __u8 oui[FDDI_K_OUI_LEN]; /* organizational universal id */ 90 __be16 ethertype; /* packet type ID field */ 91 } __attribute__((packed)); 92 93 /* Define FDDI LLC frame header */ 94 struct fddihdr { 95 __u8 fc; /* frame control */ 96 __u8 daddr[FDDI_K_ALEN]; /* destination address */ 97 __u8 saddr[FDDI_K_ALEN]; /* source address */ 98 union { 99 struct fddi_8022_1_hdr llc_8022_1; 100 struct fddi_8022_2_hdr llc_8022_2; 101 struct fddi_snap_hdr llc_snap; 102 } hdr; 103 } __attribute__((packed)); 104 105 106 #endif /* _UAPI_LINUX_IF_FDDI_H */ 107