/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Global definitions for the ANSI FDDI interface. * * Version: @(#)if_fddi.h 1.0.3 Oct 6 2018 * * Author: Lawrence V. Stefani, <stefani@yahoo.com> * Maintainer: Maciej W. Rozycki, <macro@linux-mips.org> * * if_fddi.h is based on previous if_ether.h and if_tr.h work by * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * Donald Becker, <becker@super.org> * Alan Cox, <alan@lxorguk.ukuu.org.uk> * Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk> * Peter De Schrijver, <stud11@cc4.kuleuven.ac.be> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _LINUX_IF_FDDI_H #define _LINUX_IF_FDDI_H #include <linux/types.h> /* * Define max and min legal sizes. The frame sizes do not include * 4 byte FCS/CRC (frame check sequence). */ #define FDDI_K_ALEN 6 /* Octets in one FDDI address */ #define FDDI_K_8022_HLEN 16 /* Total octets in 802.2 header */ #define FDDI_K_SNAP_HLEN 21 /* Total octets in 802.2 SNAP header */ #define FDDI_K_8022_ZLEN 16 /* Min octets in 802.2 frame sans FCS */ #define FDDI_K_SNAP_ZLEN 21 /* Min octets in 802.2 SNAP frame sans FCS */ #define FDDI_K_8022_DLEN 4475 /* Max octets in 802.2 payload */ #define FDDI_K_SNAP_DLEN 4470 /* Max octets in 802.2 SNAP payload */ #define FDDI_K_LLC_ZLEN 13 /* Min octets in LLC frame sans FCS */ #define FDDI_K_LLC_LEN 4491 /* Max octets in LLC frame sans FCS */ #define FDDI_K_OUI_LEN 3 /* Octets in OUI in 802.2 SNAP header */ /* Define FDDI Frame Control (FC) Byte masks */ #define FDDI_FC_K_CLASS_MASK 0x80 /* class bit */ #define FDDI_FC_K_CLASS_SYNC 0x80 #define FDDI_FC_K_CLASS_ASYNC 0x00 #define FDDI_FC_K_ALEN_MASK 0x40 /* address length bit */ #define FDDI_FC_K_ALEN_48 0x40 #define FDDI_FC_K_ALEN_16 0x00 #define FDDI_FC_K_FORMAT_MASK 0x30 /* format bits */ #define FDDI_FC_K_FORMAT_FUTURE 0x30 #define FDDI_FC_K_FORMAT_IMPLEMENTOR 0x20 #define FDDI_FC_K_FORMAT_LLC 0x10 #define FDDI_FC_K_FORMAT_MANAGEMENT 0x00 #define FDDI_FC_K_CONTROL_MASK 0x0f /* control bits */ /* Define FDDI Frame Control (FC) Byte specific values */ #define FDDI_FC_K_VOID 0x00 #define FDDI_FC_K_NON_RESTRICTED_TOKEN 0x80 #define FDDI_FC_K_RESTRICTED_TOKEN 0xC0 #define FDDI_FC_K_SMT_MIN 0x41 #define FDDI_FC_K_SMT_MAX 0x4F #define FDDI_FC_K_MAC_MIN 0xC1 #define FDDI_FC_K_MAC_MAX 0xCF #define FDDI_FC_K_ASYNC_LLC_MIN 0x50 #define FDDI_FC_K_ASYNC_LLC_DEF 0x54 #define FDDI_FC_K_ASYNC_LLC_MAX 0x5F #define FDDI_FC_K_SYNC_LLC_MIN 0xD0 #define FDDI_FC_K_SYNC_LLC_MAX 0xD7 #define FDDI_FC_K_IMPLEMENTOR_MIN 0x60 #define FDDI_FC_K_IMPLEMENTOR_MAX 0x6F #define FDDI_FC_K_RESERVED_MIN 0x70 #define FDDI_FC_K_RESERVED_MAX 0x7F /* Define LLC and SNAP constants */ #define FDDI_EXTENDED_SAP 0xAA #define FDDI_UI_CMD 0x03 /* Define 802.2 Type 1 header */ struct fddi_8022_1_hdr { __u8 dsap; /* destination service access point */ __u8 ssap; /* source service access point */ __u8 ctrl; /* control byte #1 */ } __attribute__((packed)); /* Define 802.2 Type 2 header */ struct fddi_8022_2_hdr { __u8 dsap; /* destination service access point */ __u8 ssap; /* source service access point */ __u8 ctrl_1; /* control byte #1 */ __u8 ctrl_2; /* control byte #2 */ } __attribute__((packed)); /* Define 802.2 SNAP header */ struct fddi_snap_hdr { __u8 dsap; /* always 0xAA */ __u8 ssap; /* always 0xAA */ __u8 ctrl; /* always 0x03 */ __u8 oui[FDDI_K_OUI_LEN]; /* organizational universal id */ __be16 ethertype; /* packet type ID field */ } __attribute__((packed)); /* Define FDDI LLC frame header */ struct fddihdr { __u8 fc; /* frame control */ __u8 daddr[FDDI_K_ALEN]; /* destination address */ __u8 saddr[FDDI_K_ALEN]; /* source address */ union { struct fddi_8022_1_hdr llc_8022_1; struct fddi_8022_2_hdr llc_8022_2; struct fddi_snap_hdr llc_snap; } hdr; } __attribute__((packed)); #endif /* _LINUX_IF_FDDI_H */