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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 Fibre Channel.
      7  *
      8  * Version:	@(#)if_fc.h	0.0	11/20/98
      9  *
     10  * Author:	Fred N. van Kempen, <waltje (at) uWalt.NL.Mugnet.ORG>
     11  *		Donald Becker, <becker (at) super.org>
     12  *    Peter De Schrijver, <stud11 (at) cc4.kuleuven.ac.be>
     13  *	  Vineet Abraham, <vma (at) 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 
     24 #define FC_ALEN	6		/* Octets in one ethernet addr	 */
     25 #define FC_HLEN   (sizeof(struct fch_hdr)+sizeof(struct fcllc))
     26 #define FC_ID_LEN 3		/* Octets in a Fibre Channel Address */
     27 
     28 /* LLC and SNAP constants */
     29 #define EXTENDED_SAP 0xAA
     30 #define UI_CMD       0x03
     31 
     32 /* This is NOT the Fibre Channel frame header. The FC frame header is
     33  *  constructed in the driver as the Tachyon needs certain fields in
     34  *  certains positions. So, it can't be generalized here.*/
     35 
     36 struct fch_hdr {
     37 	__u8  daddr[FC_ALEN];		/* destination address */
     38 	__u8  saddr[FC_ALEN];		/* source address */
     39 };
     40 
     41 /* This is a Fibre Channel LLC structure */
     42 struct fcllc {
     43 	__u8  dsap;			/* destination SAP */
     44 	__u8  ssap;			/* source SAP */
     45 	__u8  llc;			/* LLC control field */
     46 	__u8  protid[3];		/* protocol id */
     47 	__be16 ethertype;		/* ether type field */
     48 };
     49 
     50 #endif	/* _LINUX_IF_FC_H */
     51