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