The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netiso/esis.h

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    1 /*      $NetBSD: esis.h,v 1.15 2003/08/07 16:33:35 agc Exp $    */
    2 
    3 /*-
    4  * Copyright (c) 1991, 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  *      @(#)esis.h      8.1 (Berkeley) 6/10/93
   32  */
   33 
   34 /***********************************************************
   35                 Copyright IBM Corporation 1987
   36 
   37                       All Rights Reserved
   38 
   39 Permission to use, copy, modify, and distribute this software and its
   40 documentation for any purpose and without fee is hereby granted,
   41 provided that the above copyright notice appear in all copies and that
   42 both that copyright notice and this permission notice appear in
   43 supporting documentation, and that the name of IBM not be
   44 used in advertising or publicity pertaining to distribution of the
   45 software without specific, written prior permission.
   46 
   47 IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
   48 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
   49 IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
   50 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
   51 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
   52 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
   53 SOFTWARE.
   54 
   55 ******************************************************************/
   56 
   57 /*
   58  * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
   59  */
   60 
   61 #include <machine/endian.h>
   62 
   63 #define SNPAC_AGE               60      /* seconds */
   64 #define ESIS_CONFIG             60      /* seconds */
   65 #define ESIS_HT                 (ESIS_CONFIG * 2)
   66 
   67 /*
   68  *      Fixed part of an ESIS header
   69  */
   70 struct esis_fixed {
   71         u_char          esis_proto_id;  /* network layer protocol identifier */
   72         u_char          esis_hdr_len;   /* length indicator (octets) */
   73         u_char          esis_vers;      /* version/protocol identifier
   74                                          * extension */
   75         u_char          esis_res1;      /* reserved */
   76         u_char          esis_type;      /* type code */
   77         /* technically, type should be &='d 0x1f */
   78 #define ESIS_ESH        0x02    /* End System Hello */
   79 #define ESIS_ISH        0x04    /* Intermediate System Hello */
   80 #define ESIS_RD         0x06    /* Redirect */
   81         u_char          esis_ht_msb;    /* holding time (seconds) high byte */
   82         u_char          esis_ht_lsb;    /* holding time (seconds) low byte */
   83         u_char          esis_cksum_msb; /* checksum high byte */
   84         u_char          esis_cksum_lsb; /* checksum low byte */
   85 } __attribute__((packed));
   86 /*
   87  * Values for ESIS datagram options
   88  */
   89 #define ESISOVAL_NETMASK        0xe1    /* address mask option, RD PDU only */
   90 #define ESISOVAL_SNPAMASK       0xe2    /* snpa mask option, RD PDU only */
   91 #define ESISOVAL_ESCT           0xc6    /* end system conf. timer, ISH PDU
   92                                          * only */
   93 
   94 
   95 #define ESIS_CKSUM_OFF          0x07
   96 #define ESIS_CKSUM_REQUIRED(pdu)\
   97         ((pdu->esis_cksum_msb != 0) || (pdu->esis_cksum_lsb != 0))
   98 
   99 #define ESIS_VERSION    1
  100 
  101 struct esis_stat {
  102         u_short         es_nomem;       /* insufficient memory to send hello */
  103         u_short         es_badcsum;     /* incorrect checksum */
  104         u_short         es_badvers;     /* incorrect version number */
  105         u_short         es_badtype;     /* unknown pdu type field */
  106         u_short         es_toosmall;    /* packet too small */
  107         u_short         es_eshsent;     /* ESH sent */
  108         u_short         es_eshrcvd;     /* ESH rcvd */
  109         u_short         es_ishsent;     /* ISH sent */
  110         u_short         es_ishrcvd;     /* ISH rcvd */
  111         u_short         es_rdsent;      /* RD sent */
  112         u_short         es_rdrcvd;      /* RD rcvd */
  113 };
  114 
  115 #ifdef  _KERNEL
  116 extern struct esis_stat esis_stat;
  117 extern short esis_holding_time;
  118 extern short esis_config_time;
  119 extern short esis_esconfig_time;
  120 struct socket;
  121 struct mbuf;
  122 struct snpa_hdr;
  123 struct clnp_optidx;
  124 struct iso_addr;
  125 struct rtentry;
  126 struct sockaddr_dl;
  127 
  128 void esis_init __P((void));
  129 int esis_usrreq __P((struct socket *, int, struct mbuf *, struct mbuf *,
  130                      struct mbuf *, struct proc *));
  131 void esis_input __P((struct mbuf *, ...));
  132 void esis_rdoutput __P((struct snpa_hdr *, struct mbuf *, struct clnp_optidx *,
  133                         struct iso_addr *, struct rtentry *));
  134 int esis_insert_addr __P((caddr_t *, int *, struct iso_addr *, struct mbuf *,
  135                           int));
  136 void esis_eshinput __P((struct mbuf *, struct snpa_hdr *));
  137 void esis_ishinput __P((struct mbuf *, struct snpa_hdr *));
  138 void esis_rdinput __P((struct mbuf *, struct snpa_hdr *));
  139 void esis_config __P((void *));
  140 void esis_shoutput __P((struct ifnet *, int, int, caddr_t, int,
  141                        struct iso_addr *));
  142 void isis_input __P((struct mbuf *, ...));
  143 int isis_output __P((struct mbuf *, ...));
  144 void *esis_ctlinput __P((int, struct sockaddr *, void *));
  145 #endif /* _KERNEL */

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