sys/net/if_token.h

   1 /*      $NetBSD: if_token.h,v 1.15 2007/12/25 18:33:45 perry Exp $      */
   2
   3 /*
   4  * Copyright (c) 1982, 1986, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      from: NetBSD: if_fddi.h,v 1.2 1995/08/19 04:35:28 cgd Exp
  32  */
  33
  34 #ifndef _NET_IF_TOKEN_H_
  35 #define _NET_IF_TOKEN_H_
  36
  37 #define ISO88025_ADDR_LEN 6
  38
  39 /* Token Ring physical header */
  40 struct token_header {
  41         uint8_t  token_ac;                      /* access control field */
  42         uint8_t  token_fc;                      /* frame control field */
  43         uint8_t  token_dhost[ISO88025_ADDR_LEN];        /* dest. address */
  44         uint8_t  token_shost[ISO88025_ADDR_LEN];        /* source address */
  45 } __packed;
  46
  47 #define TOKEN_MAX_BRIDGE 8
  48
  49 /* Token Ring routing information field */
  50 struct token_rif {
  51         uint16_t tr_rcf;                        /* route control field */
  52         uint16_t tr_rdf[TOKEN_MAX_BRIDGE];      /* route-designator fields */
  53 } __packed;
  54
  55 /* standard values for address control and frame control field */
  56 #define TOKEN_AC                0x10
  57 #define TOKEN_FC                0x40
  58
  59 #define TOKEN_RI_PRESENT                0x80    /* routing info present bit */
  60 #define TOKEN_RCF_LEN_MASK              0x1f00
  61 #define TOKEN_RCF_BROADCAST_MASK        0xe000
  62 #define TOKEN_RCF_BROADCAST_ALL         0x8000  /* all routes broadcast */
  63 #define TOKEN_RCF_BROADCAST_SINGLE      0xc000  /* single route broadcast */
  64
  65 /*
  66  * A Token-ring frame consists of
  67  * header +      rif      + llcinfo + fcs
  68  *  14    + 2 * (0 ... 9) +    x    +  4  octets
  69  * where llcinfo contains the llcsnap header (8 octets) and the IP frame
  70  */
  71                                         /*  LLC INFO (802.5PD-2) */
  72 #define TOKEN_RCF_FRAME0        0x0000  /*    516    */
  73 #define TOKEN_RCF_FRAME1        0x0010  /*   1500    */
  74 #define TOKEN_RCF_FRAME2        0x0020  /*   2052    */
  75 #define TOKEN_RCF_FRAME3        0x0030  /*   4472    */
  76 #define TOKEN_RCF_FRAME4        0x0040  /*   8144    */
  77 #define TOKEN_RCF_FRAME5        0x0050  /*  11407    */
  78 #define TOKEN_RCF_FRAME6        0x0060  /*  17800    */
  79 #define TOKEN_RCF_FRAME7        0x0070  /*  65535    */
  80 #define TOKEN_RCF_FRAME_MASK    0x0070
  81
  82 #define TOKEN_RCF_DIRECTION     0x0080
  83
  84 /*
  85  * According to RFC 1042
  86  */
  87 #define IPMTU_4MBIT_MAX         4464
  88 #define IPMTU_16MBIT_MAX        8188
  89
  90 /*
  91  * RFC 1042:
  92  * It is recommended that all implementations support IP packets
  93  * of at least 2002 octets.
  94  */
  95 #define ISO88025_MTU 2002
  96
  97 /*
  98  * This assumes that route information fields are appended to
  99  * existing structures like llinfo_arp and token_header
 100  */
 101 #define TOKEN_RIF(x) ((struct token_rif *) ((x) + 1))
 102
 103 /*
 104  * This is a kludge to get at the token ring mac header and the source route
 105  * information after m_adj() has been used on the mbuf.
 106  * Note that m is always an mbuf with a packet header.
 107  */
 108 #define M_TRHSTART(m) \
 109         (ALIGN(((m)->m_flags & M_EXT ? (m)->m_ext.ext_buf : &(m)->m_pktdat[0]) \
 110             + sizeof (struct token_header)) - sizeof(struct token_header))
 111
 112 #if defined(_KERNEL)
 113 /*
 114  * XXX we need if_ethersubr.c with all these defines
 115  */
 116 #define tokenbroadcastaddr      etherbroadcastaddr
 117 #define token_ipmulticast_min   ether_ipmulticast_min
 118 #define token_ipmulticast_max   ether_ipmulticast_max
 119 #define token_sprintf           ether_sprintf
 120
 121 void    token_ifattach(struct ifnet *, void *);
 122 void    token_ifdetach(struct ifnet *);
 123 #endif
 124
 125 #endif /* !_NET_IF_TOKEN_H_ */