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Linux/include/uapi/linux/if_fc.h

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  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 

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