libexec/rbootd/rmp.h

   1 /*
   2  * Copyright (c) 1988, 1992 The University of Utah and the Center
   3  *      for Software Science (CSS).
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Center for Software Science of the University of Utah Computer
   9  * Science Department.  CSS requests users of this software to return
  10  * to css-dist@cs.utah.edu any improvements that they make and grant
  11  * CSS redistribution rights.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. Neither the name of the University nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  *      from: @(#)rmp.h 8.1 (Berkeley) 6/4/93
  38  *
  39  * From: Utah Hdr: rmp.h 3.1 92/07/06
  40  * Author: Jeff Forys, University of Utah CSS
  41  */
  42
  43 /*
  44  *  Define MIN/MAX sizes of RMP (ethernet) packet.
  45  *  For ease of computation, the 4 octet CRC field is not included.
  46  *
  47  *  MCLBYTES is for bpfwrite(); it is adamant about using a cluster.
  48  */
  49
  50 #define RMP_MAX_PACKET  MIN(1514,MCLBYTES)
  51 #define RMP_MIN_PACKET  60
  52
  53 /*
  54  *  Define RMP/Ethernet Multicast address (9:0:9:0:0:4) and its length.
  55  */
  56 #define RMP_ADDR        { 0x9, 0x0, 0x9, 0x0, 0x0, 0x4 }
  57 #define RMP_ADDRLEN     6
  58
  59 /*
  60  *  Define IEEE802.2 (Logical Link Control) information.
  61  */
  62 #define IEEE_DSAP_HP    0xF8    /* Destination Service Access Point */
  63 #define IEEE_SSAP_HP    0xF8    /* Source Service Access Point */
  64 #define IEEE_CNTL_HP    0x0300  /* Type 1 / I format control information */
  65
  66 #define HPEXT_DXSAP     0x608   /* HP Destination Service Access Point */
  67 #define HPEXT_SXSAP     0x609   /* HP Source Service Access Point */
  68
  69 /*
  70  *  802.3-style "Ethernet" header.
  71  */
  72
  73 struct hp_hdr {
  74         u_int8_t        daddr[RMP_ADDRLEN];
  75         u_int8_t        saddr[RMP_ADDRLEN];
  76         u_int16_t       len;
  77 };
  78
  79 /*
  80  * HP uses 802.2 LLC with their own local extensions.  This struct makes
  81  * sense out of this data (encapsulated in the above 802.3 packet).
  82  */
  83
  84 struct hp_llc {
  85         u_int8_t        dsap;           /* 802.2 DSAP */
  86         u_int8_t        ssap;           /* 802.2 SSAP */
  87         u_int16_t       cntrl;          /* 802.2 control field */
  88         u_int16_t       filler;         /* HP filler (must be zero) */
  89         u_int16_t       dxsap;          /* HP extended DSAP */
  90         u_int16_t       sxsap;          /* HP extended SSAP */
  91 };