1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * INET An implementation of the TCP/IP protocol suite for the LINUX 4*4882a593Smuzhiyun * operating system. INET is implemented using the BSD Socket 5*4882a593Smuzhiyun * interface as the means of communication with the user level. 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * Global definitions for the ANSI FDDI interface. 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * Version: @(#)if_fddi.h 1.0.3 Oct 6 2018 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * Author: Lawrence V. Stefani, <stefani@yahoo.com> 12*4882a593Smuzhiyun * Maintainer: Maciej W. Rozycki, <macro@linux-mips.org> 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * if_fddi.h is based on previous if_ether.h and if_tr.h work by 15*4882a593Smuzhiyun * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 16*4882a593Smuzhiyun * Donald Becker, <becker@super.org> 17*4882a593Smuzhiyun * Alan Cox, <alan@lxorguk.ukuu.org.uk> 18*4882a593Smuzhiyun * Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk> 19*4882a593Smuzhiyun * Peter De Schrijver, <stud11@cc4.kuleuven.ac.be> 20*4882a593Smuzhiyun * 21*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or 22*4882a593Smuzhiyun * modify it under the terms of the GNU General Public License 23*4882a593Smuzhiyun * as published by the Free Software Foundation; either version 24*4882a593Smuzhiyun * 2 of the License, or (at your option) any later version. 25*4882a593Smuzhiyun */ 26*4882a593Smuzhiyun #ifndef _UAPI_LINUX_IF_FDDI_H 27*4882a593Smuzhiyun #define _UAPI_LINUX_IF_FDDI_H 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun #include <linux/types.h> 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun /* 32*4882a593Smuzhiyun * Define max and min legal sizes. The frame sizes do not include 33*4882a593Smuzhiyun * 4 byte FCS/CRC (frame check sequence). 34*4882a593Smuzhiyun */ 35*4882a593Smuzhiyun #define FDDI_K_ALEN 6 /* Octets in one FDDI address */ 36*4882a593Smuzhiyun #define FDDI_K_8022_HLEN 16 /* Total octets in 802.2 header */ 37*4882a593Smuzhiyun #define FDDI_K_SNAP_HLEN 21 /* Total octets in 802.2 SNAP header */ 38*4882a593Smuzhiyun #define FDDI_K_8022_ZLEN 16 /* Min octets in 802.2 frame sans 39*4882a593Smuzhiyun FCS */ 40*4882a593Smuzhiyun #define FDDI_K_SNAP_ZLEN 21 /* Min octets in 802.2 SNAP frame sans 41*4882a593Smuzhiyun FCS */ 42*4882a593Smuzhiyun #define FDDI_K_8022_DLEN 4475 /* Max octets in 802.2 payload */ 43*4882a593Smuzhiyun #define FDDI_K_SNAP_DLEN 4470 /* Max octets in 802.2 SNAP payload */ 44*4882a593Smuzhiyun #define FDDI_K_LLC_ZLEN 13 /* Min octets in LLC frame sans FCS */ 45*4882a593Smuzhiyun #define FDDI_K_LLC_LEN 4491 /* Max octets in LLC frame sans FCS */ 46*4882a593Smuzhiyun #define FDDI_K_OUI_LEN 3 /* Octets in OUI in 802.2 SNAP 47*4882a593Smuzhiyun header */ 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun /* Define FDDI Frame Control (FC) Byte masks */ 50*4882a593Smuzhiyun #define FDDI_FC_K_CLASS_MASK 0x80 /* class bit */ 51*4882a593Smuzhiyun #define FDDI_FC_K_CLASS_SYNC 0x80 52*4882a593Smuzhiyun #define FDDI_FC_K_CLASS_ASYNC 0x00 53*4882a593Smuzhiyun #define FDDI_FC_K_ALEN_MASK 0x40 /* address length bit */ 54*4882a593Smuzhiyun #define FDDI_FC_K_ALEN_48 0x40 55*4882a593Smuzhiyun #define FDDI_FC_K_ALEN_16 0x00 56*4882a593Smuzhiyun #define FDDI_FC_K_FORMAT_MASK 0x30 /* format bits */ 57*4882a593Smuzhiyun #define FDDI_FC_K_FORMAT_FUTURE 0x30 58*4882a593Smuzhiyun #define FDDI_FC_K_FORMAT_IMPLEMENTOR 0x20 59*4882a593Smuzhiyun #define FDDI_FC_K_FORMAT_LLC 0x10 60*4882a593Smuzhiyun #define FDDI_FC_K_FORMAT_MANAGEMENT 0x00 61*4882a593Smuzhiyun #define FDDI_FC_K_CONTROL_MASK 0x0f /* control bits */ 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun /* Define FDDI Frame Control (FC) Byte specific values */ 64*4882a593Smuzhiyun #define FDDI_FC_K_VOID 0x00 65*4882a593Smuzhiyun #define FDDI_FC_K_NON_RESTRICTED_TOKEN 0x80 66*4882a593Smuzhiyun #define FDDI_FC_K_RESTRICTED_TOKEN 0xC0 67*4882a593Smuzhiyun #define FDDI_FC_K_SMT_MIN 0x41 68*4882a593Smuzhiyun #define FDDI_FC_K_SMT_MAX 0x4F 69*4882a593Smuzhiyun #define FDDI_FC_K_MAC_MIN 0xC1 70*4882a593Smuzhiyun #define FDDI_FC_K_MAC_MAX 0xCF 71*4882a593Smuzhiyun #define FDDI_FC_K_ASYNC_LLC_MIN 0x50 72*4882a593Smuzhiyun #define FDDI_FC_K_ASYNC_LLC_DEF 0x54 73*4882a593Smuzhiyun #define FDDI_FC_K_ASYNC_LLC_MAX 0x5F 74*4882a593Smuzhiyun #define FDDI_FC_K_SYNC_LLC_MIN 0xD0 75*4882a593Smuzhiyun #define FDDI_FC_K_SYNC_LLC_MAX 0xD7 76*4882a593Smuzhiyun #define FDDI_FC_K_IMPLEMENTOR_MIN 0x60 77*4882a593Smuzhiyun #define FDDI_FC_K_IMPLEMENTOR_MAX 0x6F 78*4882a593Smuzhiyun #define FDDI_FC_K_RESERVED_MIN 0x70 79*4882a593Smuzhiyun #define FDDI_FC_K_RESERVED_MAX 0x7F 80*4882a593Smuzhiyun 81*4882a593Smuzhiyun /* Define LLC and SNAP constants */ 82*4882a593Smuzhiyun #define FDDI_EXTENDED_SAP 0xAA 83*4882a593Smuzhiyun #define FDDI_UI_CMD 0x03 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun /* Define 802.2 Type 1 header */ 86*4882a593Smuzhiyun struct fddi_8022_1_hdr { 87*4882a593Smuzhiyun __u8 dsap; /* destination service access point */ 88*4882a593Smuzhiyun __u8 ssap; /* source service access point */ 89*4882a593Smuzhiyun __u8 ctrl; /* control byte #1 */ 90*4882a593Smuzhiyun } __attribute__((packed)); 91*4882a593Smuzhiyun 92*4882a593Smuzhiyun /* Define 802.2 Type 2 header */ 93*4882a593Smuzhiyun struct fddi_8022_2_hdr { 94*4882a593Smuzhiyun __u8 dsap; /* destination service access point */ 95*4882a593Smuzhiyun __u8 ssap; /* source service access point */ 96*4882a593Smuzhiyun __u8 ctrl_1; /* control byte #1 */ 97*4882a593Smuzhiyun __u8 ctrl_2; /* control byte #2 */ 98*4882a593Smuzhiyun } __attribute__((packed)); 99*4882a593Smuzhiyun 100*4882a593Smuzhiyun /* Define 802.2 SNAP header */ 101*4882a593Smuzhiyun struct fddi_snap_hdr { 102*4882a593Smuzhiyun __u8 dsap; /* always 0xAA */ 103*4882a593Smuzhiyun __u8 ssap; /* always 0xAA */ 104*4882a593Smuzhiyun __u8 ctrl; /* always 0x03 */ 105*4882a593Smuzhiyun __u8 oui[FDDI_K_OUI_LEN]; /* organizational universal id */ 106*4882a593Smuzhiyun __be16 ethertype; /* packet type ID field */ 107*4882a593Smuzhiyun } __attribute__((packed)); 108*4882a593Smuzhiyun 109*4882a593Smuzhiyun /* Define FDDI LLC frame header */ 110*4882a593Smuzhiyun struct fddihdr { 111*4882a593Smuzhiyun __u8 fc; /* frame control */ 112*4882a593Smuzhiyun __u8 daddr[FDDI_K_ALEN]; /* destination address */ 113*4882a593Smuzhiyun __u8 saddr[FDDI_K_ALEN]; /* source address */ 114*4882a593Smuzhiyun union { 115*4882a593Smuzhiyun struct fddi_8022_1_hdr llc_8022_1; 116*4882a593Smuzhiyun struct fddi_8022_2_hdr llc_8022_2; 117*4882a593Smuzhiyun struct fddi_snap_hdr llc_snap; 118*4882a593Smuzhiyun } hdr; 119*4882a593Smuzhiyun } __attribute__((packed)); 120*4882a593Smuzhiyun 121*4882a593Smuzhiyun 122*4882a593Smuzhiyun #endif /* _UAPI_LINUX_IF_FDDI_H */ 123