1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3  * INET		An implementation of the TCP/IP protocol suite for the LINUX
4  *		operating system.  INET is implemented using the  BSD Socket
5  *		interface as the means of communication with the user level.
6  *
7  *		Global definitions for Fibre Channel.
8  *
9  * Version:	@(#)if_fc.h	0.0	11/20/98
10  *
11  * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12  *		Donald Becker, <becker@super.org>
13  *    Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>
14  *	  Vineet Abraham, <vma@iol.unh.edu>
15  *
16  *		This program is free software; you can redistribute it and/or
17  *		modify it under the terms of the GNU General Public License
18  *		as published by the Free Software Foundation; either version
19  *		2 of the License, or (at your option) any later version.
20  */
21 #ifndef _LINUX_IF_FC_H
22 #define _LINUX_IF_FC_H
23 
24 #include <linux/types.h>
25 
26 #define FC_ALEN	6		/* Octets in one ethernet addr	 */
27 #define FC_HLEN   (sizeof(struct fch_hdr)+sizeof(struct fcllc))
28 #define FC_ID_LEN 3		/* Octets in a Fibre Channel Address */
29 
30 /* LLC and SNAP constants */
31 #define EXTENDED_SAP 0xAA
32 #define UI_CMD       0x03
33 
34 /* This is NOT the Fibre Channel frame header. The FC frame header is
35  *  constructed in the driver as the Tachyon needs certain fields in
36  *  certains positions. So, it can't be generalized here.*/
37 
38 struct fch_hdr {
39 	__u8  daddr[FC_ALEN];		/* destination address */
40 	__u8  saddr[FC_ALEN];		/* source address */
41 };
42 
43 /* This is a Fibre Channel LLC structure */
44 struct fcllc {
45 	__u8  dsap;			/* destination SAP */
46 	__u8  ssap;			/* source SAP */
47 	__u8  llc;			/* LLC control field */
48 	__u8  protid[3];		/* protocol id */
49 	__be16 ethertype;		/* ether type field */
50 };
51 
52 #endif	/* _LINUX_IF_FC_H */
53