1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * INET An implementation of the TCP/IP protocol suite for the LINUX 4 * operating system. INET is implemented using the BSD Socket 5 * interface as the means of communication with the user level. 6 * 7 * Global definitions for the ANSI FDDI interface. 8 * 9 * Version: @(#)if_fddi.h 1.0.2 Sep 29 2004 10 * 11 * Author: Lawrence V. Stefani, <stefani (at) lkg.dec.com> 12 * 13 * if_fddi.h is based on previous if_ether.h and if_tr.h work by 14 * Fred N. van Kempen, <waltje (at) uWalt.NL.Mugnet.ORG> 15 * Donald Becker, <becker (at) super.org> 16 * Alan Cox, <alan (at) lxorguk.ukuu.org.uk> 17 * Steve Whitehouse, <gw7rrm (at) eeshack3.swan.ac.uk> 18 * Peter De Schrijver, <stud11 (at) cc4.kuleuven.ac.be> 19 * 20 * This program is free software; you can redistribute it and/or 21 * modify it under the terms of the GNU General Public License 22 * as published by the Free Software Foundation; either version 23 * 2 of the License, or (at your option) any later version. 24 */ 25 #ifndef _UAPI_LINUX_IF_FDDI_H 26 #define _UAPI_LINUX_IF_FDDI_H 27 28 #include <linux/types.h> 29 30 /* 31 * Define max and min legal sizes. The frame sizes do not include 32 * 4 byte FCS/CRC (frame check sequence). 33 */ 34 #define FDDI_K_ALEN 6 /* Octets in one FDDI address */ 35 #define FDDI_K_8022_HLEN 16 /* Total octets in 802.2 header */ 36 #define FDDI_K_SNAP_HLEN 21 /* Total octets in 802.2 SNAP header */ 37 #define FDDI_K_8022_ZLEN 16 /* Min octets in 802.2 frame sans 38 FCS */ 39 #define FDDI_K_SNAP_ZLEN 21 /* Min octets in 802.2 SNAP frame sans 40 FCS */ 41 #define FDDI_K_8022_DLEN 4475 /* Max octets in 802.2 payload */ 42 #define FDDI_K_SNAP_DLEN 4470 /* Max octets in 802.2 SNAP payload */ 43 #define FDDI_K_LLC_ZLEN 13 /* Min octets in LLC frame sans FCS */ 44 #define FDDI_K_LLC_LEN 4491 /* Max octets in LLC frame sans FCS */ 45 #define FDDI_K_OUI_LEN 3 /* Octets in OUI in 802.2 SNAP 46 header */ 47 48 /* Define FDDI Frame Control (FC) Byte values */ 49 #define FDDI_FC_K_VOID 0x00 50 #define FDDI_FC_K_NON_RESTRICTED_TOKEN 0x80 51 #define FDDI_FC_K_RESTRICTED_TOKEN 0xC0 52 #define FDDI_FC_K_SMT_MIN 0x41 53 #define FDDI_FC_K_SMT_MAX 0x4F 54 #define FDDI_FC_K_MAC_MIN 0xC1 55 #define FDDI_FC_K_MAC_MAX 0xCF 56 #define FDDI_FC_K_ASYNC_LLC_MIN 0x50 57 #define FDDI_FC_K_ASYNC_LLC_DEF 0x54 58 #define FDDI_FC_K_ASYNC_LLC_MAX 0x5F 59 #define FDDI_FC_K_SYNC_LLC_MIN 0xD0 60 #define FDDI_FC_K_SYNC_LLC_MAX 0xD7 61 #define FDDI_FC_K_IMPLEMENTOR_MIN 0x60 62 #define FDDI_FC_K_IMPLEMENTOR_MAX 0x6F 63 #define FDDI_FC_K_RESERVED_MIN 0x70 64 #define FDDI_FC_K_RESERVED_MAX 0x7F 65 66 /* Define LLC and SNAP constants */ 67 #define FDDI_EXTENDED_SAP 0xAA 68 #define FDDI_UI_CMD 0x03 69 70 /* Define 802.2 Type 1 header */ 71 struct fddi_8022_1_hdr { 72 __u8 dsap; /* destination service access point */ 73 __u8 ssap; /* source service access point */ 74 __u8 ctrl; /* control byte #1 */ 75 } __attribute__((packed)); 76 77 /* Define 802.2 Type 2 header */ 78 struct fddi_8022_2_hdr { 79 __u8 dsap; /* destination service access point */ 80 __u8 ssap; /* source service access point */ 81 __u8 ctrl_1; /* control byte #1 */ 82 __u8 ctrl_2; /* control byte #2 */ 83 } __attribute__((packed)); 84 85 /* Define 802.2 SNAP header */ 86 struct fddi_snap_hdr { 87 __u8 dsap; /* always 0xAA */ 88 __u8 ssap; /* always 0xAA */ 89 __u8 ctrl; /* always 0x03 */ 90 __u8 oui[FDDI_K_OUI_LEN]; /* organizational universal id */ 91 __be16 ethertype; /* packet type ID field */ 92 } __attribute__((packed)); 93 94 /* Define FDDI LLC frame header */ 95 struct fddihdr { 96 __u8 fc; /* frame control */ 97 __u8 daddr[FDDI_K_ALEN]; /* destination address */ 98 __u8 saddr[FDDI_K_ALEN]; /* source address */ 99 union { 100 struct fddi_8022_1_hdr llc_8022_1; 101 struct fddi_8022_2_hdr llc_8022_2; 102 struct fddi_snap_hdr llc_snap; 103 } hdr; 104 } __attribute__((packed)); 105 106 107 #endif /* _UAPI_LINUX_IF_FDDI_H */ 108
