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1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */2/*3 * INET An implementation of the TCP/IP protocol suite for the LINUX4 * operating system. INET is implemented using the BSD Socket5 * 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 1.0.3 Oct 6 201810 *11 * Author: Lawrence V. Stefani, <stefani@yahoo.com>12 * Maintainer: Maciej W. Rozycki, <macro@orcam.me.uk>13 *14 * if_fddi.h is based on previous if_ether.h and if_tr.h work by15 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>16 * Donald Becker, <becker@super.org>17 * Alan Cox, <alan@lxorguk.ukuu.org.uk>18 * Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>19 * Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>20 *21 * This program is free software; you can redistribute it and/or22 * modify it under the terms of the GNU General Public License23 * as published by the Free Software Foundation; either version24 * 2 of the License, or (at your option) any later version.25 */26#ifndef _UAPI_LINUX_IF_FDDI_H27#define _UAPI_LINUX_IF_FDDI_H28 29#include <linux/types.h>30 31/*32 * Define max and min legal sizes. The frame sizes do not include33 * 4 byte FCS/CRC (frame check sequence).34 */35#define FDDI_K_ALEN 6 /* Octets in one FDDI address */36#define FDDI_K_8022_HLEN 16 /* Total octets in 802.2 header */37#define FDDI_K_SNAP_HLEN 21 /* Total octets in 802.2 SNAP header */38#define FDDI_K_8022_ZLEN 16 /* Min octets in 802.2 frame sans39 FCS */40#define FDDI_K_SNAP_ZLEN 21 /* Min octets in 802.2 SNAP frame sans41 FCS */42#define FDDI_K_8022_DLEN 4475 /* Max octets in 802.2 payload */43#define FDDI_K_SNAP_DLEN 4470 /* Max octets in 802.2 SNAP payload */44#define FDDI_K_LLC_ZLEN 13 /* Min octets in LLC frame sans FCS */45#define FDDI_K_LLC_LEN 4491 /* Max octets in LLC frame sans FCS */46#define FDDI_K_OUI_LEN 3 /* Octets in OUI in 802.2 SNAP47 header */48 49/* Define FDDI Frame Control (FC) Byte masks */50#define FDDI_FC_K_CLASS_MASK 0x80 /* class bit */51#define FDDI_FC_K_CLASS_SYNC 0x8052#define FDDI_FC_K_CLASS_ASYNC 0x0053#define FDDI_FC_K_ALEN_MASK 0x40 /* address length bit */54#define FDDI_FC_K_ALEN_48 0x4055#define FDDI_FC_K_ALEN_16 0x0056#define FDDI_FC_K_FORMAT_MASK 0x30 /* format bits */57#define FDDI_FC_K_FORMAT_FUTURE 0x3058#define FDDI_FC_K_FORMAT_IMPLEMENTOR 0x2059#define FDDI_FC_K_FORMAT_LLC 0x1060#define FDDI_FC_K_FORMAT_MANAGEMENT 0x0061#define FDDI_FC_K_CONTROL_MASK 0x0f /* control bits */62 63/* Define FDDI Frame Control (FC) Byte specific values */64#define FDDI_FC_K_VOID 0x0065#define FDDI_FC_K_NON_RESTRICTED_TOKEN 0x8066#define FDDI_FC_K_RESTRICTED_TOKEN 0xC067#define FDDI_FC_K_SMT_MIN 0x4168#define FDDI_FC_K_SMT_MAX 0x4F69#define FDDI_FC_K_MAC_MIN 0xC170#define FDDI_FC_K_MAC_MAX 0xCF71#define FDDI_FC_K_ASYNC_LLC_MIN 0x5072#define FDDI_FC_K_ASYNC_LLC_DEF 0x5473#define FDDI_FC_K_ASYNC_LLC_MAX 0x5F74#define FDDI_FC_K_SYNC_LLC_MIN 0xD075#define FDDI_FC_K_SYNC_LLC_MAX 0xD776#define FDDI_FC_K_IMPLEMENTOR_MIN 0x6077#define FDDI_FC_K_IMPLEMENTOR_MAX 0x6F78#define FDDI_FC_K_RESERVED_MIN 0x7079#define FDDI_FC_K_RESERVED_MAX 0x7F80 81/* Define LLC and SNAP constants */82#define FDDI_EXTENDED_SAP 0xAA83#define FDDI_UI_CMD 0x0384 85/* Define 802.2 Type 1 header */86struct fddi_8022_1_hdr {87 __u8 dsap; /* destination service access point */88 __u8 ssap; /* source service access point */89 __u8 ctrl; /* control byte #1 */90} __attribute__((packed));91 92/* Define 802.2 Type 2 header */93struct fddi_8022_2_hdr {94 __u8 dsap; /* destination service access point */95 __u8 ssap; /* source service access point */96 __u8 ctrl_1; /* control byte #1 */97 __u8 ctrl_2; /* control byte #2 */98} __attribute__((packed));99 100/* Define 802.2 SNAP header */101struct fddi_snap_hdr {102 __u8 dsap; /* always 0xAA */103 __u8 ssap; /* always 0xAA */104 __u8 ctrl; /* always 0x03 */105 __u8 oui[FDDI_K_OUI_LEN]; /* organizational universal id */106 __be16 ethertype; /* packet type ID field */107} __attribute__((packed));108 109/* Define FDDI LLC frame header */110struct fddihdr {111 __u8 fc; /* frame control */112 __u8 daddr[FDDI_K_ALEN]; /* destination address */113 __u8 saddr[FDDI_K_ALEN]; /* source address */114 union {115 struct fddi_8022_1_hdr llc_8022_1;116 struct fddi_8022_2_hdr llc_8022_2;117 struct fddi_snap_hdr llc_snap;118 } hdr;119} __attribute__((packed));120 121 122#endif /* _UAPI_LINUX_IF_FDDI_H */123