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1.1 root 1: /*-
2: * Copyright (c) 1991 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)esis.h 7.4 (Berkeley) 5/6/91
34: */
35:
36: /***********************************************************
37: Copyright IBM Corporation 1987
38:
39: All Rights Reserved
40:
41: Permission to use, copy, modify, and distribute this software and its
42: documentation for any purpose and without fee is hereby granted,
43: provided that the above copyright notice appear in all copies and that
44: both that copyright notice and this permission notice appear in
45: supporting documentation, and that the name of IBM not be
46: used in advertising or publicity pertaining to distribution of the
47: software without specific, written prior permission.
48:
49: IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
50: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
51: IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
52: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
53: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
54: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
55: SOFTWARE.
56:
57: ******************************************************************/
58:
59: /*
60: * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
61: */
62: /*
63: * $Header: esis.h,v 4.7 88/09/15 11:24:18 hagens Exp $
64: * $Source: /usr/argo/sys/netiso/RCS/esis.h,v $
65: */
66:
67: #ifndef BYTE_ORDER
68: /*
69: * Definitions for byte order,
70: * according to byte significance from low address to high.
71: */
72: #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */
73: #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */
74: #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */
75:
76: #ifdef vax
77: #define BYTE_ORDER LITTLE_ENDIAN
78: #else
79: #define BYTE_ORDER BIG_ENDIAN /* mc68000, tahoe, most others */
80: #endif
81: #endif BYTE_ORDER
82:
83: #define SNPAC_AGE 60 /* seconds */
84: #define ESIS_CONFIG 60 /* seconds */
85: #define ESIS_HT (ESIS_CONFIG * 2)
86:
87: /*
88: * Fixed part of an ESIS header
89: */
90: struct esis_fixed {
91: u_char esis_proto_id; /* network layer protocol identifier */
92: u_char esis_hdr_len; /* length indicator (octets) */
93: u_char esis_vers; /* version/protocol identifier extension */
94: u_char esis_res1; /* reserved */
95: u_char esis_type; /* type code */
96: /* technically, type should be &='d 0x1f */
97: #define ESIS_ESH 0x02 /* End System Hello */
98: #define ESIS_ISH 0x04 /* Intermediate System Hello */
99: #define ESIS_RD 0x06 /* Redirect */
100: u_char esis_ht_msb; /* holding time (seconds) high byte */
101: u_char esis_ht_lsb; /* holding time (seconds) low byte */
102: u_char esis_cksum_msb; /* checksum high byte */
103: u_char esis_cksum_lsb; /* checksum low byte */
104: };
105: /*
106: * Values for ESIS datagram options
107: */
108: #define ESISOVAL_NETMASK 0xe1 /* address mask option, RD PDU only */
109: #define ESISOVAL_SNPAMASK 0xe2 /* snpa mask option, RD PDU only */
110: #define ESISOVAL_ESCT 0xc6 /* end system conf. timer, ISH PDU only */
111:
112:
113: #define ESIS_CKSUM_OFF 0x07
114: #define ESIS_CKSUM_REQUIRED(pdu)\
115: ((pdu->esis_cksum_msb != 0) || (pdu->esis_cksum_lsb != 0))
116:
117: #define ESIS_VERSION 1
118:
119: struct esis_stat {
120: u_short es_nomem; /* insufficient memory to send hello */
121: u_short es_badcsum; /* incorrect checksum */
122: u_short es_badvers; /* incorrect version number */
123: u_short es_badtype; /* unknown pdu type field */
124: u_short es_toosmall; /* packet too small */
125: u_short es_eshsent; /* ESH sent */
126: u_short es_eshrcvd; /* ESH rcvd */
127: u_short es_ishsent; /* ISH sent */
128: u_short es_ishrcvd; /* ISH rcvd */
129: u_short es_rdsent; /* RD sent */
130: u_short es_rdrcvd; /* RD rcvd */
131: };
132:
133: #ifdef KERNEL
134: struct esis_stat esis_stat;
135: #endif KERNEL
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