summaryrefslogtreecommitdiffstats
path: root/makemib
blob: b59e2f105a7566a9223c3844a0f7ee577eb50d00 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
#!/bin/sh
#
# Copyright (c) 1990, 1996
#	John Robert LoVerso. All rights reserved.
# SMIv2 parsing copyright (c) 1999
#	William C. Fenner.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notices, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
#    notices, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# @(#) $Id: makemib,v 1.3 2001-09-17 22:16:52 fenner Exp $ (jlv)

#
# This script will read either ASN.1-style MIB files or the ".defs" files
# created by the ISODE "mosy" program on such files.
#
# The output of this script is the "mib.h" file used by tcpdumps' ASN.1/SNMP
# decoding code.
#
# This script needs to be run by "gawk" (GNU awk).  "nawk" will work, but
# dump will get a recursion error if you process LARGE mibs.  While it would
# by farily easy to rewrite this not to use recursion (and also easy to
# eliminate use of gsub and functions to use classic "awk"), you have to 
# order the structure declarations in defined-first order for the compiler
# not to barf; too bad tsort doesn't take arguments.
#

cat << EOF
/*
 * This file was generated by tcpdump/makemib on `date`
 * You probably don't want to edit this by hand!
 *
 * struct mib somename = { desc, oid-octet, type, child-pointer, next-pointer 
};
 */

EOF

awk '
BEGIN {
	debug=0;
	# for sanity, we prep the namespace with objects from RFC-1155
	# (we manually establish the root)
	oid["iso"]=1
	oidadd("org", "iso", 3)
	oidadd("dod", "org", 6)
	oidadd("internet", "dod", 1)
	oidadd("directory", "internet", 1)
	oidadd("mgmt", "internet", 2)
#XXX	oidadd("mib", "mgmt", 1)
	oidadd("mib-2", "mgmt", 1)
	oidadd("experimental", "internet", 3)
	oidadd("private", "internet", 4)
	oidadd("enterprises", "private", 1)
	oidadd("ip", "mib-2", 4)
	oidadd("transmission", "mib-2", 10)

	holddesc="none"
}

#
# Read mosy "*.defs" file.  mosy does all the parsing work; we just read
# its simple and straightforward output.  It would not be too hard to make
# tcpdump directly read mosy output, but...
#
# Ignore these unless the current file is called something.defs; false
# positives are too common in DESCRIPTIONs.

NF > 1 && index($2,".")>0 && FILENAME ~ /\.defs/ {
	# currently ignore items of the form "{ iso.3.6.1 }"
	if (split($2, p, ".") == 2) {
		oidadd($1, p[1], p[2])
	}
	next
}

#
# Must be a MIB file
# Make it easier to parse - used to be done by sed
{ sub(/--\*.*\*--/, ""); sub(/--.*/, ""); gsub(/[{}]/, " & "); }

#
# this next section is simple and naive, but does the job ok
#

# foo OBJECT IDENTIFIER ::= { baz 17 }
# or
# foo OBJECT IDENTIFIER ::=
# { baz 17 }
$2$3$4 == "OBJECTIDENTIFIER::=" {
	holddesc="none"
	if (NF == 8)
		oidadd($1, $6, $7)
	if (NF == 4)
		holddesc=$1
	next
}
$1 == "{" && holddesc != "none" && NF == 4 {
	oidadd(holddesc, $2, $3)
	holddesc="none"
}
#
# foo OBJECT IDENTIFIER
#  ::= { bar 1 }
$2$3 == "OBJECTIDENTIFIER" && $1 != "SYNTAX" && NF == 3 {
	holddesc=$1
}
#
# foo
# OBJECT IDENTIFIER ::= { bar 1 }
# a couple of heuristics to exclude single words in e.g. long
#  DESCRIPTION clauses
NF == 1 && $1 ~ "[a-z][a-z]*[A-Z]" && $1 !~ /[(){}.,]/ && holddesc == "none" {
	holddesc=$1
}
$1$2$3 == "OBJECTIDENTIFIER::=" && holddesc != "none" {
	oidadd(holddesc, $5, $6)
	holddesc="none"
}
#
# "normal" style
# foo OBJECT-TYPE ...
# ...
#   ::= { baz 5 }
$2 == "MODULE-IDENTITY" || $2 == "MODULE-COMPLIANCE" ||
	$2 == "OBJECT-IDENTITY" || $2 == "OBJECT-TYPE" ||
	$2 == "OBJECT-GROUP" ||
	$2 == "NOTIFICATION-TYPE" || $2 == "NOTIFICATION-GROUP" {
	holddesc=$1
}
$1 == "::=" && holddesc != "none" && NF == 5 {
	oidadd(holddesc, $3, $4)
	holddesc="none"
}
#
# foo ::= { baz 17 }
$2$3 == "::={" {
	oidadd($1,$4,$5)
	holddesc="none"
}


# 
# End of the road - output the data.
#

END {
	print "struct obj"
	dump("iso")
	print "*mibroot = &_iso_obj;"
}

function inn(file) {
	if (file == "" || file == "-")
		return ""
	return " in " file
}

#
# add a new object to the tree
#
#		new OBJECT IDENTIFIER ::= { parent value }
#

function oidadd(new, parent, value) {
	# Ignore 0.0
	if (parent == "0" && value == 0)
		return
	if (debug)
		print "/* oidadd" inn(FILENAME) ":", new, "in", parent, "as", value, "line", $0, "*/"
	# use safe C identifiers
	gsub(/[-&\/]/,"",new)
	gsub(/[-&\/]/,"",parent)
	# check if parent missing
	if (oid[parent] == "") {
		printf "/* parse problem%s: no parent for %s.%s(%d) */\n", \
			inn(FILENAME), parent, new, value
		return
	}
	# check if parent.value already exists
	if (oid[new] > 0 && oid[new] != value) {
		printf "/* parse problem%s: dup %s.%s(%d) != old (%d) */\n", \
			inn(FILENAME), parent, new, value, oid[new]
		return
	}
	# check for new name for parent.value
	if (child[parent] != "") {
		for (sib = child[parent]; sib != ""; sib = sibling[sib])
			if (oid[sib] == value) {
				if (new != sib)
					printf "/* parse problem%s: new name" \
						" \"%s\"" \
						" for %s.%s(%d) ignored */\n", \
						inn(FILENAME), new, parent, \
						sib, value
				return
			}
	}

	oid[new]=value
	if (child[parent] == "") {
		child[parent] = new
	} else {
		sibling[new] = child[parent]
		child[parent] = new
	}
}

#
# old(?) routine to recurse down the tree (in postfix order for convenience)
#

function dump(item, c, s) {
#	newitem=sofar"."item"("oid[item]")"
#	printf "/* %s c=%s s=%s */\n", newitem, child[item], sibling[item]
	c="NULL"
	if (child[item] != "") {
		dump(child[item])
		c = "&_"child[item]"_obj"
	}
	s="NULL"
	if (sibling[item] != "") {
		dump(sibling[item])
		s = "&_"sibling[item]"_obj"
	}
	printf "_%s_obj = {\n\t\"%s\", %d, 0,\n\t%s, %s\n},\n", \
		item, item, oid[item], c, s
}
' $@
exit 0
OpenPOWER on IntegriCloud