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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 | ||
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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 */ | |
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95 | u_char esis_type; /* type code */ |
96 | /* technically, type should be &='d 0x1f */ | |
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97 | #define ESIS_ESH 0x02 /* End System Hello */ |
98 | #define ESIS_ISH 0x04 /* Intermediate System Hello */ | |
99 | #define ESIS_RD 0x06 /* Redirect */ | |
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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 | }; | |
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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 | ||
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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 |