include/linux/if_fc.h

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