FreeBSD/Linux Kernel Cross Reference
sys/net/iso88025.h

     /*
      * Copyright (c) 1998, Larry Lile
      * All rights reserved.
      *
      * For latest sources and information on this driver, please
      * go to http://anarchy.stdio.com.
      *
      * Questions, comments or suggestions should be directed to
      * Larry Lile <lile@stdio.com>.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice unmodified, this list of conditions, and the following
     *    disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     *
     * Information gathered from tokenring@freebsd, /sys/net/ethernet.h and
     * the Mach token ring driver.
     */
    
    /*
     * Fundamental constants relating to iso 802.5
     */
    
    #ifndef _NET_ISO88025_H_
    #define _NET_ISO88025_H_
    
    /*
     * General ISO 802.5 definitions
     */
    #define ISO88025_ADDR_LEN       6
    #define ISO88025_HDR_LEN        (ISO88025_CF_LEN + (ISO88025_ADDR_LEN * 2))
    #define ISO88025_CF_LEN         2
    #define RCF_LEN                 2
    #define RIF_MAX_RD              14
    #define RIF_MAX_LEN             16
    
    #define TR_AC                   0x10
    #define TR_LLC_FRAME            0x40
    
    #define TR_4MBPS                4000000
    #define TR_16MBPS               16000000
    #define TR_100MBPS              100000000
    
    /*
     * Source routing 
     */
    #define TR_RII                  0x80
    #define TR_RCF_BCST_MASK        0xe000
    #define TR_RCF_LEN_MASK         0x1f00
    #define TR_RCF_DIR              0x0080
    #define TR_RCF_LF_MASK          0x0070
    
    #define TR_RCF_RIFLEN(x)        ((ntohs(x) & TR_RCF_LEN_MASK) >> 8)
    
    /*
     * Minimum and maximum packet payload lengths.
     */
    #define ISO88025_MIN_LEN        0 
    #define ISO88025_MAX_LEN        17960   
    
    /*
     * A macro to validate a length with
     */
    #define ISO88025_IS_VALID_LEN(foo)      \
            ((foo) >= ISO88025_MIN_LEN && (foo) <= ISO88025_MAX_LEN)
    
    /*
     * ISO 802.5 physical header
     */
    struct iso88025_header {
            u_char  ac;                                 /* access control field */
            u_char  fc;                                 /* frame control field */
            u_char  iso88025_dhost[ISO88025_ADDR_LEN];  /* destination address */
            u_char  iso88025_shost[ISO88025_ADDR_LEN];  /* source address */
            u_short rcf;                                /* route control field */
            u_short rd[RIF_MAX_RD];                     /* routing designators */
    };
    
    struct iso88025_sockaddr_data {
            u_char ether_dhost[ISO88025_ADDR_LEN];
           u_char ether_shost[ISO88025_ADDR_LEN];
           u_char ac;
           u_char fc;
   };
   
   struct iso88025_sockaddr_dl_data {
           u_short  trld_rcf;
           u_short *trld_route[RIF_MAX_LEN];
   };
   
   #define ISO88025_MAX(a, b)      (((a)>(b))?(a):(b))
   #define SDL_ISO88025(s)         ((struct iso88025_sockaddr_dl_data *)   \
                                    ((s)->sdl_data + \
                                     ISO88025_MAX((s)->sdl_nlen + (s)->sdl_alen + \
                                                  (s)->sdl_slen, 12)))
   
   /*
    * Structure of a 48-bit iso 802.5 address.
    *  ( We could also add the 16 bit addresses as a union)
    */
   struct  iso88025_addr {
           u_char octet[ISO88025_ADDR_LEN];
   };
   
   #define ISO88025_MAX_MTU        18000
   #define ISO88025_DEFAULT_MTU    1500
   #define senderr(e) { error = (e); goto bad;}
   
   void    iso88025_ifattach __P((struct ifnet *));
   int     iso88025_ioctl __P((struct ifnet *, int , caddr_t ));
   int     iso88025_output __P((struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *));
   void    iso88025_input __P((struct ifnet *, struct iso88025_header *, struct mbuf *));
   
   #endif

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