/* 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 @ orcam . me . uk >
*
* 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 _UAPI_LINUX_IF_FDDI_H
#define _UAPI_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 0 x80 /* class bit */
#define FDDI_FC_K_CLASS_SYNC 0 x80
#define FDDI_FC_K_CLASS_ASYNC 0 x00
#define FDDI_FC_K_ALEN_MASK 0 x40 /* address length bit */
#define FDDI_FC_K_ALEN_48 0 x40
#define FDDI_FC_K_ALEN_16 0 x00
#define FDDI_FC_K_FORMAT_MASK 0 x30 /* format bits */
#define FDDI_FC_K_FORMAT_FUTURE 0 x30
#define FDDI_FC_K_FORMAT_IMPLEMENTOR 0 x20
#define FDDI_FC_K_FORMAT_LLC 0 x10
#define FDDI_FC_K_FORMAT_MANAGEMENT 0 x00
#define FDDI_FC_K_CONTROL_MASK 0 x0f /* control bits */
/* Define FDDI Frame Control (FC) Byte specific values */
#define FDDI_FC_K_VOID 0 x00
#define FDDI_FC_K_NON_RESTRICTED_TOKEN 0 x80
#define FDDI_FC_K_RESTRICTED_TOKEN 0 xC0
#define FDDI_FC_K_SMT_MIN 0 x41
#define FDDI_FC_K_SMT_MAX 0 x4F
#define FDDI_FC_K_MAC_MIN 0 xC1
#define FDDI_FC_K_MAC_MAX 0 xCF
#define FDDI_FC_K_ASYNC_LLC_MIN 0 x50
#define FDDI_FC_K_ASYNC_LLC_DEF 0 x54
#define FDDI_FC_K_ASYNC_LLC_MAX 0 x5F
#define FDDI_FC_K_SYNC_LLC_MIN 0 xD0
#define FDDI_FC_K_SYNC_LLC_MAX 0 xD7
#define FDDI_FC_K_IMPLEMENTOR_MIN 0 x60
#define FDDI_FC_K_IMPLEMENTOR_MAX 0 x6F
#define FDDI_FC_K_RESERVED_MIN 0 x70
#define FDDI_FC_K_RESERVED_MAX 0 x7F
/* Define LLC and SNAP constants */
#define FDDI_EXTENDED_SAP 0 xAA
#define FDDI_UI_CMD 0 x03
/* 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 /* _UAPI_LINUX_IF_FDDI_H */
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